21110111012001 has 32 divisors (see below), whose sum is σ = 31024328606208. Its totient is φ = 12661228131840.

The previous prime is 21110111011993. The next prime is 21110111012009. The reversal of 21110111012001 is 10021011101112.

It is an interprime number because it is at equal distance from previous prime (21110111011993) and next prime (21110111012009).

It is not a de Polignac number, because 21110111012001 - 2³ = 21110111011993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110111012009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47290290 + ... + 47734596.

It is an arithmetic number, because the mean of its divisors is an integer number (969510268944).

Almost surely, 2^{21110111012001} is an apocalyptic number.

It is an amenable number.

21110111012001 is a deficient number, since it is larger than the sum of its proper divisors (9914217594207).

21110111012001 is a wasteful number, since it uses less digits than its factorization.

21110111012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459261.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21110111012001 its reverse (10021011101112), we get a palindrome (31131122113113).

The spelling of 21110111012001 in words is "twenty-one trillion, one hundred ten billion, one hundred eleven million, twelve thousand, one".