321221012031 has 12 divisors (see below), whose sum is σ = 468322224552. Its totient is φ = 212145963696.

The previous prime is 321221011997. The next prime is 321221012041. The reversal of 321221012031 is 130210122123.

321221012031 is a `hidden beast` number, since 321 + 221 + 0 + 120 + 3 + 1 = 666.

It is not a de Polignac number, because 321221012031 - 2⁶ = 321221011967 is a prime.

It is a super-2 number, since 2×321221012031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321221011995 and 321221012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221012041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166780456 + ... + 166782381.

It is an arithmetic number, because the mean of its divisors is an integer number (39026852046).

Almost surely, 2^321221012031 is an apocalyptic number.

321221012031 is a deficient number, since it is larger than the sum of its proper divisors (147101212521).

321221012031 is a wasteful number, since it uses less digits than its factorization.

321221012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333562950 (or 333562947 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321221012031 its reverse (130210122123), we get a palindrome (451431134154).

The spelling of 321221012031 in words is "three hundred twenty-one billion, two hundred twenty-one million, twelve thousand, thirty-one".