1231220022231 has 8 divisors (see below), whose sum is σ = 1641632452864. Its totient is φ = 820810469880.

The previous prime is 1231220022211. The next prime is 1231220022259. The reversal of 1231220022231 is 1322200221321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231220022231 - 2⁷ = 1231220022103 is a prime.

It is a super-2 number, since 2×1231220022231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231220022198 and 1231220022207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231220022211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652050 + ... + 1699296.

It is an arithmetic number, because the mean of its divisors is an integer number (205204056608).

Almost surely, 2^{1231220022231} is an apocalyptic number.

1231220022231 is a deficient number, since it is larger than the sum of its proper divisors (410412430633).

1231220022231 is a wasteful number, since it uses less digits than its factorization.

1231220022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439141.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1231220022231 its reverse (1322200221321), we get a palindrome (2553420243552).

The spelling of 1231220022231 in words is "one trillion, two hundred thirty-one billion, two hundred twenty million, twenty-two thousand, two hundred thirty-one".