201023120211123 has 32 divisors (see below), whose sum is σ = 306426668613120. Its totient is φ = 114830712529920.

The previous prime is 201023120211107. The next prime is 201023120211131. The reversal of 201023120211123 is 321112021320102.

It is not a de Polignac number, because 201023120211123 - 2⁴ = 201023120211107 is a prime.

It is a super-2 number, since 2×201023120211123² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 201023120211123.

It is not an unprimeable number, because it can be changed into a prime (201023120211223) 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, 1213026393 + ... + 1213192101.

It is an arithmetic number, because the mean of its divisors is an integer number (9575833394160).

Almost surely, 2^{201023120211123} is an apocalyptic number.

201023120211123 is a deficient number, since it is larger than the sum of its proper divisors (105403548401997).

201023120211123 is a wasteful number, since it uses less digits than its factorization.

201023120211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185307.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 201023120211123 its reverse (321112021320102), we get a palindrome (522135141531225).

The spelling of 201023120211123 in words is "two hundred one trillion, twenty-three billion, one hundred twenty million, two hundred eleven thousand, one hundred twenty-three".