21122210102002 has 4 divisors (see below), whose sum is σ = 31683315153006. Its totient is φ = 10561105051000.

The previous prime is 21122210101987. The next prime is 21122210102087. The reversal of 21122210102002 is 20020101222112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16181463619161 + 4940746482841 = 4022619^2 + 2222779^2 .

It is a super-2 number, since 2×21122210102002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280552525499 + ... + 5280552525502.

Almost surely, 2^{21122210102002} is an apocalyptic number.

21122210102002 is a deficient number, since it is larger than the sum of its proper divisors (10561105051004).

21122210102002 is a wasteful number, since it uses less digits than its factorization.

21122210102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561105051003.

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

Adding to 21122210102002 its reverse (20020101222112), we get a palindrome (41142311324114).

The spelling of 21122210102002 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, one hundred two thousand, two".