31221324229 has 8 divisors (see below), whose sum is σ = 33314752640. Its totient is φ = 29172915936.

The previous prime is 31221324209. The next prime is 31221324241. The reversal of 31221324229 is 92242312213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31221324229 - 2²⁵ = 31187769797 is a prime.

It is a super-2 number, since 2×31221324229² (a number of 22 digits) contains 22 as substring.

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 31221324229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221324209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11253597 + ... + 11256370.

It is an arithmetic number, because the mean of its divisors is an integer number (4164344080).

Almost surely, 2^31221324229 is an apocalyptic number.

It is an amenable number.

31221324229 is a deficient number, since it is larger than the sum of its proper divisors (2093428411).

31221324229 is a wasteful number, since it uses less digits than its factorization.

31221324229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22510059.

The product of its digits is 10368, while the sum is 31.

The spelling of 31221324229 in words is "thirty-one billion, two hundred twenty-one million, three hundred twenty-four thousand, two hundred twenty-nine".