21122021022002 has 8 divisors (see below), whose sum is σ = 31683052579116. Its totient is φ = 10561003495632.

The previous prime is 21122021021989. The next prime is 21122021022019. The reversal of 21122021022002 is 20022012022112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21050652433801 + 71368588201 = 4588099^2 + 267149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122021022002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1961108 + ... + 6788960.

Almost surely, 2^{21122021022002} is an apocalyptic number.

21122021022002 is a deficient number, since it is larger than the sum of its proper divisors (10561031557114).

21122021022002 is a wasteful number, since it uses less digits than its factorization.

21122021022002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015372.

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

Adding to 21122021022002 its reverse (20022012022112), we get a palindrome (41144033044114).

The spelling of 21122021022002 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, twenty-two thousand, two".