21321213002122 has 32 divisors (see below), whose sum is σ = 35716329633600. Its totient is φ = 9464004230400.

The previous prime is 21321213002113. The next prime is 21321213002143. The reversal of 21321213002122 is 22120031212312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21321213002093 and 21321213002102.

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, 56963247 + ... + 57336322.

It is an arithmetic number, because the mean of its divisors is an integer number (1116135301050).

Almost surely, 2^{21321213002122} is an apocalyptic number.

21321213002122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21321213002122 is a deficient number, since it is larger than the sum of its proper divisors (14395116631478).

21321213002122 is a wasteful number, since it uses less digits than its factorization.

21321213002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114299782.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21321213002122 its reverse (22120031212312), we get a palindrome (43441244214434).

The spelling of 21321213002122 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred thirteen million, two thousand, one hundred twenty-two".