31220212112002 has 4 divisors (see below), whose sum is σ = 46830318168006. Its totient is φ = 15610106056000.

The previous prime is 31220212111997. The next prime is 31220212112039. The reversal of 31220212112002 is 20021121202213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31034046614041 + 186165497961 = 5570821^2 + 431469^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7805053027999 + ... + 7805053028002.

Almost surely, 2^{31220212112002} is an apocalyptic number.

31220212112002 is a deficient number, since it is larger than the sum of its proper divisors (15610106056004).

31220212112002 is a wasteful number, since it uses less digits than its factorization.

31220212112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15610106056003.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31220212112002 its reverse (20021121202213), we get a palindrome (51241333314215).

The spelling of 31220212112002 in words is "thirty-one trillion, two hundred twenty billion, two hundred twelve million, one hundred twelve thousand, two".