201210121012111 has 32 divisors (see below), whose sum is σ = 210651007656960. Its totient is φ = 192030521115264.

The previous prime is 201210121012063. The next prime is 201210121012123. The reversal of 201210121012111 is 111210121012102.

It is a cyclic number.

It is not a de Polignac number, because 201210121012111 - 2⁷ = 201210121011983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210121012811) 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, 1276805320 + ... + 1276962898.

It is an arithmetic number, because the mean of its divisors is an integer number (6582843989280).

Almost surely, 2^{201210121012111} is an apocalyptic number.

201210121012111 is a deficient number, since it is larger than the sum of its proper divisors (9440886644849).

201210121012111 is a wasteful number, since it uses less digits than its factorization.

201210121012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160815.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 201210121012111 its reverse (111210121012102), we get a palindrome (312420242024213).

Subtracting from 201210121012111 its reverse (111210121012102), we obtain a palindrome (90000000000009).

The spelling of 201210121012111 in words is "two hundred one trillion, two hundred ten billion, one hundred twenty-one million, twelve thousand, one hundred eleven".