121221320213232 has 160 divisors (see below), whose sum is σ = 384435900956160. Its totient is φ = 36376730311680.

The previous prime is 121221320213183. The next prime is 121221320213281. The reversal of 121221320213232 is 232312023122121.

121221320213232 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 213 + 2 + 0 + 213 + 232 = 666.

It is an interprime number because it is at equal distance from previous prime (121221320213183) and next prime (121221320213281).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 121221320213196 and 121221320213205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358660894 + ... + 358998717.

It is an arithmetic number, because the mean of its divisors is an integer number (2402724380976).

Almost surely, 2^{121221320213232} is an apocalyptic number.

121221320213232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221320213232 is an abundant number, since it is smaller than the sum of its proper divisors (263214580742928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221320213232 is a wasteful number, since it uses less digits than its factorization.

121221320213232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717659668 (or 717659656 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 121221320213232 its reverse (232312023122121), we get a palindrome (353533343335353).

The spelling of 121221320213232 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, three hundred twenty million, two hundred thirteen thousand, two hundred thirty-two".