2123211021131 has 16 divisors (see below), whose sum is σ = 2204556583680. Its totient is φ = 2042700349440.

The previous prime is 2123211021083. The next prime is 2123211021163. The reversal of 2123211021131 is 1311201123212.

It is a cyclic number.

It is not a de Polignac number, because 2123211021131 - 2²² = 2123206826827 is a prime.

It is a super-2 number, since 2×2123211021131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123211021181) 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, 3793415 + ... + 4316991.

It is an arithmetic number, because the mean of its divisors is an integer number (137784786480).

Almost surely, 2^{2123211021131} is an apocalyptic number.

2123211021131 is a deficient number, since it is larger than the sum of its proper divisors (81345562549).

2123211021131 is a wasteful number, since it uses less digits than its factorization.

2123211021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524374.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2123211021131 its reverse (1311201123212), we get a palindrome (3434412144343).

The spelling of 2123211021131 in words is "two trillion, one hundred twenty-three billion, two hundred eleven million, twenty-one thousand, one hundred thirty-one".