1211222320131 has 16 divisors (see below), whose sum is σ = 1615771123200. Its totient is φ = 807077637408.

The previous prime is 1211222320123. The next prime is 1211222320199. The reversal of 1211222320131 is 1310232221121.

It is not a de Polignac number, because 1211222320131 - 2³ = 1211222320123 is a prime.

It is a super-2 number, since 2×1211222320131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211222320098 and 1211222320107.

It is not an unprimeable number, because it can be changed into a prime (1211222320031) 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, 86330025 + ... + 86344053.

It is an arithmetic number, because the mean of its divisors is an integer number (100985695200).

Almost surely, 2^{1211222320131} is an apocalyptic number.

1211222320131 is a deficient number, since it is larger than the sum of its proper divisors (404548803069).

1211222320131 is a wasteful number, since it uses less digits than its factorization.

1211222320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26378.

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

Adding to 1211222320131 its reverse (1310232221121), we get a palindrome (2521454541252).

The spelling of 1211222320131 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, three hundred twenty thousand, one hundred thirty-one".