31221034001 has 4 divisors (see below), whose sum is σ = 31384495104. Its totient is φ = 31057572900.

The previous prime is 31221033971. The next prime is 31221034007. The reversal of 31221034001 is 10043012213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31221034001 - 2³⁰ = 30147292177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31221034007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81730265 + ... + 81730646.

It is an arithmetic number, because the mean of its divisors is an integer number (7846123776).

Almost surely, 2^31221034001 is an apocalyptic number.

It is an amenable number.

31221034001 is a deficient number, since it is larger than the sum of its proper divisors (163461103).

31221034001 is a wasteful number, since it uses less digits than its factorization.

31221034001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163461102.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31221034001 its reverse (10043012213), we get a palindrome (41264046214).

The spelling of 31221034001 in words is "thirty-one billion, two hundred twenty-one million, thirty-four thousand, one".