21210222222002 has 128 divisors (see below), whose sum is σ = 37370826144000. Its totient is φ = 8921667870720.

The previous prime is 21210222221983. The next prime is 21210222222073. The reversal of 21210222222002 is 20022222201212.

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, 9733923749 + ... + 9733925927.

It is an arithmetic number, because the mean of its divisors is an integer number (291959579250).

Almost surely, 2^{21210222222002} is an apocalyptic number.

21210222222002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210222222002 is a deficient number, since it is larger than the sum of its proper divisors (16160603921998).

21210222222002 is a wasteful number, since it uses less digits than its factorization.

21210222222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21210222222002 its reverse (20022222201212), we get a palindrome (41232444423214).

The spelling of 21210222222002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twenty-two thousand, two".