1231032021999 has 16 divisors (see below), whose sum is σ = 1800987344352. Its totient is φ = 743264615808.

The previous prime is 1231032021979. The next prime is 1231032022013. The reversal of 1231032021999 is 9991202301321.

It is not a de Polignac number, because 1231032021999 - 2⁷ = 1231032021871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231032021999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231032021979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297780232 + ... + 297784365.

It is an arithmetic number, because the mean of its divisors is an integer number (112561709022).

Almost surely, 2^{1231032021999} is an apocalyptic number.

1231032021999 is a deficient number, since it is larger than the sum of its proper divisors (569955322353).

1231032021999 is a wasteful number, since it uses less digits than its factorization.

1231032021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595564666.

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 1231032021999 in words is "one trillion, two hundred thirty-one billion, thirty-two million, twenty-one thousand, nine hundred ninety-nine".