31222041121 has 4 divisors (see below), whose sum is σ = 31378936000. Its totient is φ = 31065146244.

The previous prime is 31222041091. The next prime is 31222041131. The reversal of 31222041121 is 12114022213.

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 31222041121 - 2¹⁵ = 31222008353 is a prime.

It is a super-2 number, since 2×31222041121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31222041131) 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, 78447141 + ... + 78447538.

It is an arithmetic number, because the mean of its divisors is an integer number (7844734000).

Almost surely, 2^31222041121 is an apocalyptic number.

It is an amenable number.

31222041121 is a deficient number, since it is larger than the sum of its proper divisors (156894879).

31222041121 is a wasteful number, since it uses less digits than its factorization.

31222041121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156894878.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31222041121 its reverse (12114022213), we get a palindrome (43336063334).

The spelling of 31222041121 in words is "thirty-one billion, two hundred twenty-two million, forty-one thousand, one hundred twenty-one".