31222211202001 has 4 divisors (see below), whose sum is σ = 31222224152500. Its totient is φ = 31222198251504.

The previous prime is 31222211201981. The next prime is 31222211202019. The reversal of 31222211202001 is 10020211222213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5766957299601 + 25455253902400 = 2401449^2 + 5045320^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222211202001 - 2¹³ = 31222211193809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31222211202001.

It is not an unprimeable number, because it can be changed into a prime (31222211202101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670526 + ... + 8076823.

It is an arithmetic number, because the mean of its divisors is an integer number (7805556038125).

Almost surely, 2^{31222211202001} is an apocalyptic number.

It is an amenable number.

31222211202001 is a deficient number, since it is larger than the sum of its proper divisors (12950499).

31222211202001 is an equidigital number, since it uses as much as digits as its factorization.

31222211202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12950498.

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

Adding to 31222211202001 its reverse (10020211222213), we get a palindrome (41242422424214).

The spelling of 31222211202001 in words is "thirty-one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred two thousand, one".