31223220310002 has 32 divisors (see below), whose sum is σ = 71368764937344. Its totient is φ = 8920744560000.

The previous prime is 31223220309997. The next prime is 31223220310031. The reversal of 31223220310002 is 20001302232213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5146149 + ... + 9430232.

It is an arithmetic number, because the mean of its divisors is an integer number (2230273904292).

Almost surely, 2^{31223220310002} is an apocalyptic number.

31223220310002 is an abundant number, since it is smaller than the sum of its proper divisors (40145544627342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223220310002 is a wasteful number, since it uses less digits than its factorization.

31223220310002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14627394.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31223220310002 its reverse (20001302232213), we get a palindrome (51224522542215).

The spelling of 31223220310002 in words is "thirty-one trillion, two hundred twenty-three billion, two hundred twenty million, three hundred ten thousand, two".