211102001231 has 16 divisors (see below), whose sum is σ = 235949189760. Its totient is φ = 187237957920.

The previous prime is 211102001221. The next prime is 211102001251. The reversal of 211102001231 is 132100201112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211102001231 is a prime.

It is a super-2 number, since 2×211102001231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102001221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907085 + ... + 1115798.

It is an arithmetic number, because the mean of its divisors is an integer number (14746824360).

Almost surely, 2^211102001231 is an apocalyptic number.

211102001231 is a deficient number, since it is larger than the sum of its proper divisors (24847188529).

211102001231 is a wasteful number, since it uses less digits than its factorization.

211102001231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023126.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211102001231 its reverse (132100201112), we get a palindrome (343202202343).

The spelling of 211102001231 in words is "two hundred eleven billion, one hundred two million, one thousand, two hundred thirty-one".