1231123011202 has 32 divisors (see below), whose sum is σ = 2227941072000. Its totient is φ = 498422170368.

The previous prime is 1231123011137. The next prime is 1231123011253. The reversal of 1231123011202 is 2021103211321.

It is a super-2 number, since 2×1231123011202² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1231123011202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6537943 + ... + 6723610.

It is an arithmetic number, because the mean of its divisors is an integer number (69623158500).

Almost surely, 2^{1231123011202} is an apocalyptic number.

1231123011202 is a deficient number, since it is larger than the sum of its proper divisors (996818060798).

1231123011202 is a wasteful number, since it uses less digits than its factorization.

1231123011202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13261930.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1231123011202 its reverse (2021103211321), we get a palindrome (3252226222523).

The spelling of 1231123011202 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-three million, eleven thousand, two hundred two".