21213001031122 has 32 divisors (see below), whose sum is σ = 34908733036800. Its totient is φ = 9628233907968.

The previous prime is 21213001031077. The next prime is 21213001031153. The reversal of 21213001031122 is 22113010031212.

It is a self number, because there is not a number n which added to its sum of digits gives 21213001031122.

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, 99655722 + ... + 99868357.

It is an arithmetic number, because the mean of its divisors is an integer number (1090897907400).

Almost surely, 2^{21213001031122} is an apocalyptic number.

21213001031122 is a deficient number, since it is larger than the sum of its proper divisors (13695732005678).

21213001031122 is a wasteful number, since it uses less digits than its factorization.

21213001031122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199524210.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21213001031122 its reverse (22113010031212), we get a palindrome (43326011062334).

The spelling of 21213001031122 in words is "twenty-one trillion, two hundred thirteen billion, one million, thirty-one thousand, one hundred twenty-two".