21021221031002 has 32 divisors (see below), whose sum is σ = 32695108617600. Its totient is φ = 10128727702080.

The previous prime is 21021221030969. The next prime is 21021221031049. The reversal of 21021221031002 is 20013012212012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704249 + ... + 6522147.

It is an arithmetic number, because the mean of its divisors is an integer number (1021722144300).

Almost surely, 2^{21021221031002} is an apocalyptic number.

21021221031002 is a deficient number, since it is larger than the sum of its proper divisors (11673887586598).

21021221031002 is a wasteful number, since it uses less digits than its factorization.

21021221031002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818406.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21021221031002 its reverse (20013012212012), we get a palindrome (41034233243014).

The spelling of 21021221031002 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-one million, thirty-one thousand, two".