1231120222311 has 32 divisors (see below), whose sum is σ = 1968015744000. Its totient is φ = 669671976960.

The previous prime is 1231120222271. The next prime is 1231120222337. The reversal of 1231120222311 is 1132220211321.

It is not a de Polignac number, because 1231120222311 - 2¹⁸ = 1231119960167 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231120222361) 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, 14192986 + ... + 14279463.

It is an arithmetic number, because the mean of its divisors is an integer number (61500492000).

Almost surely, 2^{1231120222311} is an apocalyptic number.

1231120222311 is a deficient number, since it is larger than the sum of its proper divisors (736895521689).

1231120222311 is a wasteful number, since it uses less digits than its factorization.

1231120222311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28472559.

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

Adding to 1231120222311 its reverse (1132220211321), we get a palindrome (2363340433632).

The spelling of 1231120222311 in words is "one trillion, two hundred thirty-one billion, one hundred twenty million, two hundred twenty-two thousand, three hundred eleven".