21021012222002 has 64 divisors (see below), whose sum is σ = 36460631088000. Its totient is φ = 9003197205504.

The previous prime is 21021012221941. The next prime is 21021012222029. The reversal of 21021012222002 is 20022221012012.

It is a happy number.

It is a super-2 number, since 2×21021012222002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 in 31 ways as a sum of consecutive naturals, for example, 17732168 + ... + 18880460.

It is an arithmetic number, because the mean of its divisors is an integer number (569697360750).

Almost surely, 2^{21021012222002} is an apocalyptic number.

21021012222002 is a deficient number, since it is larger than the sum of its proper divisors (15439618865998).

21021012222002 is a wasteful number, since it uses less digits than its factorization.

21021012222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148907.

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

Adding to 21021012222002 its reverse (20022221012012), we get a palindrome (41043233234014).

The spelling of 21021012222002 in words is "twenty-one trillion, twenty-one billion, twelve million, two hundred twenty-two thousand, two".