21120222211002 has 12 divisors (see below), whose sum is σ = 45760481457210. Its totient is φ = 7040074070328.

The previous prime is 21120222210979. The next prime is 21120222211019. The reversal of 21120222211002 is 20011222202112.

It is a happy number.

21120222211002 is a `hidden beast` number, since 211 + 20 + 222 + 211 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20133177974001 + 987044237001 = 4487001^2 + 993501^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173345678389 = 21120222211002 / (2 + 1 + 1 + 2 + 0 + 2 + 2 + 2 + 2 + 1 + 1 + 0 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586672839177 + ... + 586672839212.

Almost surely, 2^{21120222211002} is an apocalyptic number.

21120222211002 is an abundant number, since it is smaller than the sum of its proper divisors (24640259246208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120222211002 is a wasteful number, since it uses less digits than its factorization.

21120222211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173345678397 (or 1173345678394 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120222211002 its reverse (20011222202112), we get a palindrome (41131444413114).

The spelling of 21120222211002 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, two hundred eleven thousand, two".