121226636880 has 160 divisors (see below), whose sum is σ = 442120809600. Its totient is φ = 30425499648.

The previous prime is 121226636879. The next prime is 121226636887. The reversal of 121226636880 is 88636622121.

121226636880 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 2 + 6 + 636 + 8 + 8 + 0 = 666.

It is a super-2 number, since 2×121226636880² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121226636887) by changing a digit.

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, 1613970 + ... + 1687409.

It is an arithmetic number, because the mean of its divisors is an integer number (2763255060).

Almost surely, 2^121226636880 is an apocalyptic number.

121226636880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121226636880 is an abundant number, since it is smaller than the sum of its proper divisors (320894172720).

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

121226636880 is a wasteful number, since it uses less digits than its factorization.

121226636880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301418 (or 3301406 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 121226636880 in words is "one hundred twenty-one billion, two hundred twenty-six million, six hundred thirty-six thousand, eight hundred eighty".