31102012229 has 4 divisors (see below), whose sum is σ = 31102517100. Its totient is φ = 31101507360.

The previous prime is 31102012181. The next prime is 31102012231. The reversal of 31102012229 is 92221020113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92221020113 = 17 ⋅5424765889.

It can be written as a sum of positive squares in 2 ways, for example, as 9160404100 + 21941608129 = 95710^2 + 148127^2 .

It is a cyclic number.

It is not a de Polignac number, because 31102012229 - 2²⁸ = 30833576773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102012259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144704 + ... + 288345.

It is an arithmetic number, because the mean of its divisors is an integer number (7775629275).

Almost surely, 2^31102012229 is an apocalyptic number.

It is an amenable number.

31102012229 is a deficient number, since it is larger than the sum of its proper divisors (504871).

31102012229 is an equidigital number, since it uses as much as digits as its factorization.

31102012229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504870.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 31102012229 in words is "thirty-one billion, one hundred two million, twelve thousand, two hundred twenty-nine".