21122210022002 has 4 divisors (see below), whose sum is σ = 31683315033006. Its totient is φ = 10561105011000.

The previous prime is 21122210021929. The next prime is 21122210022029. The reversal of 21122210022002 is 20022001222112.

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., 20942146435081 + 180063586921 = 4576259^2 + 424339^2 .

It is a super-2 number, since 2×21122210022002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280552505499 + ... + 5280552505502.

Almost surely, 2^{21122210022002} is an apocalyptic number.

21122210022002 is a deficient number, since it is larger than the sum of its proper divisors (10561105011004).

21122210022002 is a wasteful number, since it uses less digits than its factorization.

21122210022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10561105011003.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21122210022002 its reverse (20022001222112), we get a palindrome (41144211244114).

The spelling of 21122210022002 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, twenty-two thousand, two".