1213020312231 has 256 divisors, whose sum is σ = 2131295846400. Its totient is φ = 596850757632.

The previous prime is 1213020312181. The next prime is 1213020312233. The reversal of 1213020312231 is 1322130203121.

It is not a de Polignac number, because 1213020312231 - 2⁶ = 1213020312167 is a prime.

It is a super-2 number, since 2×1213020312231² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1213020312198 and 1213020312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213020312233) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 6776649700 + ... + 6776649878.

It is an arithmetic number, because the mean of its divisors is an integer number (8325374400).

Almost surely, 2^{1213020312231} is an apocalyptic number.

1213020312231 is a deficient number, since it is larger than the sum of its proper divisors (918275534169).

1213020312231 is a wasteful number, since it uses less digits than its factorization.

1213020312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1213020312231 its reverse (1322130203121), we get a palindrome (2535150515352).

It can be divided in two parts, 1213020 and 312231, that added together give a palindrome (1525251).

The spelling of 1213020312231 in words is "one trillion, two hundred thirteen billion, twenty million, three hundred twelve thousand, two hundred thirty-one".