21001010022002 has 16 divisors (see below), whose sum is σ = 33355977437952. Its totient is φ = 9882403917120.

The previous prime is 21001010021969. The next prime is 21001010022037. The reversal of 21001010022002 is 20022001010012.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 12456038 + ... + 14041185.

It is an arithmetic number, because the mean of its divisors is an integer number (2084748589872).

Almost surely, 2^{21001010022002} is an apocalyptic number.

21001010022002 is a deficient number, since it is larger than the sum of its proper divisors (12354967415950).

21001010022002 is a wasteful number, since it uses less digits than its factorization.

21001010022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26520553.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21001010022002 its reverse (20022001010012), we get a palindrome (41023011032014).

The spelling of 21001010022002 in words is "twenty-one trillion, one billion, ten million, twenty-two thousand, two".