121320213031100 has 36 divisors (see below), whose sum is σ = 263265398649624. Its totient is φ = 48527986342080.

The previous prime is 121320213031097. The next prime is 121320213031103. The reversal of 121320213031100 is 1130312023121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121320213031097) and next prime (121320213031103).

It is a super-2 number, since 2×121320213031100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320213031103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66636494 + ... + 68432906.

Almost surely, 2^{121320213031100} is an apocalyptic number.

121320213031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121320213031100 is an abundant number, since it is smaller than the sum of its proper divisors (141945185618524).

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

121320213031100 is a wasteful number, since it uses less digits than its factorization.

121320213031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471774 (or 2471767 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121320213031100 its reverse (1130312023121), we get a palindrome (122450525054221).

The spelling of 121320213031100 in words is "one hundred twenty-one trillion, three hundred twenty billion, two hundred thirteen million, thirty-one thousand, one hundred".