31030221401 has 4 divisors (see below), whose sum is σ = 31058355072. Its totient is φ = 31002087732.

The previous prime is 31030221371. The next prime is 31030221407. The reversal of 31030221401 is 10412203013.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10412203013 = 1049 ⋅9925837.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31030221401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31030221401.

It is not an unprimeable number, because it can be changed into a prime (31030221407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14065181 + ... + 14067386.

It is an arithmetic number, because the mean of its divisors is an integer number (7764588768).

Almost surely, 2^31030221401 is an apocalyptic number.

It is an amenable number.

31030221401 is a deficient number, since it is larger than the sum of its proper divisors (28133671).

31030221401 is a wasteful number, since it uses less digits than its factorization.

31030221401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28133670.

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

Adding to 31030221401 its reverse (10412203013), we get a palindrome (41442424414).

The spelling of 31030221401 in words is "thirty-one billion, thirty million, two hundred twenty-one thousand, four hundred one".