21111233000121 has 96 divisors (see below), whose sum is σ = 34600363257600. Its totient is φ = 12711869913600.

The previous prime is 21111233000069. The next prime is 21111233000149. The reversal of 21111233000121 is 12100033211112.

21111233000121 is a `hidden beast` number, since 211 + 1 + 1 + 2 + 330 + 0 + 0 + 121 = 666.

It is not a de Polignac number, because 21111233000121 - 2¹⁵ = 21111232967353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111233000094 and 21111233000103.

It is not an unprimeable number, because it can be changed into a prime (21111233000021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1277215585 + ... + 1277232113.

It is an arithmetic number, because the mean of its divisors is an integer number (360420450600).

Almost surely, 2^{21111233000121} is an apocalyptic number.

It is an amenable number.

21111233000121 is a deficient number, since it is larger than the sum of its proper divisors (13489130257479).

21111233000121 is a wasteful number, since it uses less digits than its factorization.

21111233000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19068 (or 19051 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21111233000121 its reverse (12100033211112), we get a palindrome (33211266211233).

It can be divided in two parts, 211112 and 33000121, that added together give a palindrome (33211233).

The spelling of 21111233000121 in words is "twenty-one trillion, one hundred eleven billion, two hundred thirty-three million, one hundred twenty-one", and thus it is an aban number.