121100212212021 has 48 divisors (see below), whose sum is σ = 205368963321600. Its totient is φ = 67311978718464.

The previous prime is 121100212212011. The next prime is 121100212212041. The reversal of 121100212212021 is 120212212001121.

121100212212021 is a `hidden beast` number, since 121 + 100 + 21 + 221 + 202 + 1 = 666.

It is not a de Polignac number, because 121100212212021 - 2¹³ = 121100212203829 is a prime.

It is a super-2 number, since 2×121100212212021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121100212211985 and 121100212212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100212212011) 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 47 ways as a sum of consecutive naturals, for example, 1893520 + ... + 15677558.

It is an arithmetic number, because the mean of its divisors is an integer number (4278520069200).

Almost surely, 2^{121100212212021} is an apocalyptic number.

It is an amenable number.

121100212212021 is a deficient number, since it is larger than the sum of its proper divisors (84268751109579).

121100212212021 is a wasteful number, since it uses less digits than its factorization.

121100212212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13787858 (or 13787855 counting only the distinct ones).

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

Adding to 121100212212021 its reverse (120212212001121), we get a palindrome (241312424213142).

The spelling of 121100212212021 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, two hundred twelve thousand, twenty-one".