21021201222002 has 16 divisors (see below), whose sum is σ = 31567708771872. Its totient is φ = 10498633236000.

The previous prime is 21021201221987. The next prime is 21021201222013. The reversal of 21021201222002 is 20022210212012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26312813 + ... + 27099935.

It is an arithmetic number, because the mean of its divisors is an integer number (1972981798242).

Almost surely, 2^{21021201222002} is an apocalyptic number.

21021201222002 is a deficient number, since it is larger than the sum of its proper divisors (10546507549870).

21021201222002 is a wasteful number, since it uses less digits than its factorization.

21021201222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802313.

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

Adding to 21021201222002 its reverse (20022210212012), we get a palindrome (41043411434014).

The spelling of 21021201222002 in words is "twenty-one trillion, twenty-one billion, two hundred one million, two hundred twenty-two thousand, two".