21120121110122 has 16 divisors (see below), whose sum is σ = 31882465105920. Its totient is φ = 10492706155632.

The previous prime is 21120121110079. The next prime is 21120121110163. The reversal of 21120121110122 is 22101112102112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120121110122.

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, 17777222 + ... + 18928017.

It is an arithmetic number, because the mean of its divisors is an integer number (1992654069120).

Almost surely, 2^{21120121110122} is an apocalyptic number.

21120121110122 is a deficient number, since it is larger than the sum of its proper divisors (10762343995798).

21120121110122 is a wasteful number, since it uses less digits than its factorization.

21120121110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36707077.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21120121110122 its reverse (22101112102112), we get a palindrome (43221233212234).

The spelling of 21120121110122 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-one million, one hundred ten thousand, one hundred twenty-two".