31220222001 has 16 divisors (see below), whose sum is σ = 43903982400. Its totient is φ = 19679277888.

The previous prime is 31220221997. The next prime is 31220222017. The reversal of 31220222001 is 10022202213.

It is a happy number.

It is not a de Polignac number, because 31220222001 - 2² = 31220221997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31220222041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509026 + ... + 567051.

It is an arithmetic number, because the mean of its divisors is an integer number (2743998900).

Almost surely, 2^31220222001 is an apocalyptic number.

It is an amenable number.

31220222001 is a deficient number, since it is larger than the sum of its proper divisors (12683760399).

31220222001 is a wasteful number, since it uses less digits than its factorization.

31220222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076608.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 31220222001 its reverse (10022202213), we get a palindrome (41242424214).

The spelling of 31220222001 in words is "thirty-one billion, two hundred twenty million, two hundred twenty-two thousand, one".