31213010222 has 4 divisors (see below), whose sum is σ = 46819515336. Its totient is φ = 15606505110.

The previous prime is 31213010221. The next prime is 31213010239. The reversal of 31213010222 is 22201031213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22201031213 = 19 ⋅1168475327.

It is a self number, because there is not a number n which added to its sum of digits gives 31213010222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213010221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803252554 + ... + 7803252557.

It is an arithmetic number, because the mean of its divisors is an integer number (11704878834).

Almost surely, 2^31213010222 is an apocalyptic number.

31213010222 is a deficient number, since it is larger than the sum of its proper divisors (15606505114).

31213010222 is a wasteful number, since it uses less digits than its factorization.

31213010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15606505113.

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

Adding to 31213010222 its reverse (22201031213), we get a palindrome (53414041435).

The spelling of 31213010222 in words is "thirty-one billion, two hundred thirteen million, ten thousand, two hundred twenty-two".