21120010221122 has 16 divisors (see below), whose sum is σ = 31923746373120. Its totient is φ = 10479064014432.

The previous prime is 21120010221053. The next prime is 21120010221127. The reversal of 21120010221122 is 22112201002112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120010221122.

It is not an unprimeable number, because it can be changed into a prime (21120010221127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75506222 + ... + 75785417.

It is an arithmetic number, because the mean of its divisors is an integer number (1995234148320).

Almost surely, 2^{21120010221122} is an apocalyptic number.

21120010221122 is a deficient number, since it is larger than the sum of its proper divisors (10803736151998).

21120010221122 is a wasteful number, since it uses less digits than its factorization.

21120010221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151292177.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21120010221122 its reverse (22112201002112), we get a palindrome (43232211223234).

The spelling of 21120010221122 in words is "twenty-one trillion, one hundred twenty billion, ten million, two hundred twenty-one thousand, one hundred twenty-two".