31220102213 has 4 divisors (see below), whose sum is σ = 31224797280. Its totient is φ = 31215407148.

The previous prime is 31220102203. The next prime is 31220102237.

31220102213 is nontrivially palindromic in base 10.

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 31220102213 - 2³⁴ = 14040233029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31220102191 and 31220102200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220102203) 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, 2337545 + ... + 2350862.

It is an arithmetic number, because the mean of its divisors is an integer number (7806199320).

Almost surely, 2^31220102213 is an apocalyptic number.

It is an amenable number.

31220102213 is a deficient number, since it is larger than the sum of its proper divisors (4695067).

31220102213 is an equidigital number, since it uses as much as digits as its factorization.

31220102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695066.

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

The spelling of 31220102213 in words is "thirty-one billion, two hundred twenty million, one hundred two thousand, two hundred thirteen".