21012222002002 has 128 divisors (see below), whose sum is σ = 42488810496000. Its totient is φ = 7544832894720.

The previous prime is 21012222001993. The next prime is 21012222002011. The reversal of 21012222002002 is 20020022221012.

It is an interprime number because it is at equal distance from previous prime (21012222001993) and next prime (21012222002011).

It is a super-2 number, since 2×21012222002002² (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 63 ways as a sum of consecutive naturals, for example, 857314524 + ... + 857339032.

It is an arithmetic number, because the mean of its divisors is an integer number (331943832000).

Almost surely, 2^{21012222002002} is an apocalyptic number.

21012222002002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012222002002 is an abundant number, since it is smaller than the sum of its proper divisors (21476588493998).

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

21012222002002 is a wasteful number, since it uses less digits than its factorization.

21012222002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32504.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21012222002002 its reverse (20020022221012), we get a palindrome (41032244223014).

The spelling of 21012222002002 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, two thousand, two".