31221442041 has 4 divisors (see below), whose sum is σ = 41628589392. Its totient is φ = 20814294692.

The previous prime is 31221442027. The next prime is 31221442093. The reversal of 31221442041 is 14024412213.

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 31221442041 - 2⁷ = 31221441913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31221442001) 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, 5203573671 + ... + 5203573676.

It is an arithmetic number, because the mean of its divisors is an integer number (10407147348).

Almost surely, 2^31221442041 is an apocalyptic number.

It is an amenable number.

31221442041 is a deficient number, since it is larger than the sum of its proper divisors (10407147351).

31221442041 is a wasteful number, since it uses less digits than its factorization.

31221442041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10407147350.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 31221442041 its reverse (14024412213), we get a palindrome (45245854254).

The spelling of 31221442041 in words is "thirty-one billion, two hundred twenty-one million, four hundred forty-two thousand, forty-one".