1231002232031 has 32 divisors (see below), whose sum is σ = 1459865816640. Its totient is φ = 1023261465600.

The previous prime is 1231002231973. The next prime is 1231002232037. The reversal of 1231002232031 is 1302322001321.

It is a de Polignac number, because none of the positive numbers 2^k-1231002232031 is a prime.

It is a super-2 number, since 2×1231002232031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231002231994 and 1231002232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231002232037) 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, 77506211 + ... + 77522091.

It is an arithmetic number, because the mean of its divisors is an integer number (45620806770).

Almost surely, 2^{1231002232031} is an apocalyptic number.

1231002232031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231002232031 is a deficient number, since it is larger than the sum of its proper divisors (228863584609).

1231002232031 is a wasteful number, since it uses less digits than its factorization.

1231002232031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20987.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1231002232031 its reverse (1302322001321), we get a palindrome (2533324233352).

The spelling of 1231002232031 in words is "one trillion, two hundred thirty-one billion, two million, two hundred thirty-two thousand, thirty-one".