2111201512231 has 16 divisors (see below), whose sum is σ = 2517753429504. Its totient is φ = 1730890475424.

The previous prime is 2111201512219. The next prime is 2111201512237. The reversal of 2111201512231 is 1322151021112.

It is a cyclic number.

It is not a de Polignac number, because 2111201512231 - 2²³ = 2111193123623 is a prime.

It is a super-2 number, since 2×2111201512231² (a number of 25 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 (2111201512237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12456600 + ... + 12624946.

It is an arithmetic number, because the mean of its divisors is an integer number (157359589344).

Almost surely, 2^{2111201512231} is an apocalyptic number.

2111201512231 is a deficient number, since it is larger than the sum of its proper divisors (406551917273).

2111201512231 is a wasteful number, since it uses less digits than its factorization.

2111201512231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246270.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 2111201512231 its reverse (1322151021112), we get a palindrome (3433352533343).

The spelling of 2111201512231 in words is "two trillion, one hundred eleven billion, two hundred one million, five hundred twelve thousand, two hundred thirty-one".