121211100222120 has 96 divisors (see below), whose sum is σ = 399332460407400. Its totient is φ = 31880179777536.

The previous prime is 121211100222073. The next prime is 121211100222127. The reversal of 121211100222120 is 21222001112121.

121211100222120 is a `hidden beast` number, since 1 + 212 + 1 + 110 + 0 + 222 + 120 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 95504922566244 + 25706177655876 = 9772662^2 + 5070126^2 .

It is a super-2 number, since 2×121211100222120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121211100222093 and 121211100222102.

It is not an unprimeable number, because it can be changed into a prime (121211100222127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2306120985 + ... + 2306173544.

Almost surely, 2^{121211100222120} is an apocalyptic number.

121211100222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211100222120 is an abundant number, since it is smaller than the sum of its proper divisors (278121360185280).

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

121211100222120 is a wasteful number, since it uses less digits than its factorization.

121211100222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612294619 (or 4612294612 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121211100222120 its reverse (21222001112121), we get a palindrome (142433101334241).

The spelling of 121211100222120 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred million, two hundred twenty-two thousand, one hundred twenty".