21202120010122 has 16 divisors (see below), whose sum is σ = 31929847709760. Its totient is φ = 10558851943392.

The previous prime is 21202120010111. The next prime is 21202120010167. The reversal of 21202120010122 is 22101002120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21202120010096 and 21202120010105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696747 + ... + 6549022.

It is an arithmetic number, because the mean of its divisors is an integer number (1995615481860).

Almost surely, 2^{21202120010122} is an apocalyptic number.

21202120010122 is a deficient number, since it is larger than the sum of its proper divisors (10727727699638).

21202120010122 is a wasteful number, since it uses less digits than its factorization.

21202120010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7251597.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202120010122 its reverse (22101002120212), we get a palindrome (43303122130334).

The spelling of 21202120010122 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, ten thousand, one hundred twenty-two".