21051222322130 has 64 divisors (see below), whose sum is σ = 50876240825088. Its totient is φ = 6056695330560.

The previous prime is 21051222322129. The next prime is 21051222322139. The reversal of 21051222322130 is 3122322215012.

It is a happy number.

It is a super-2 number, since 2×21051222322130² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 21051222322130.

It is not an unprimeable number, because it can be changed into a prime (21051222322139) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1051499597 + ... + 1051519616.

It is an arithmetic number, because the mean of its divisors is an integer number (794941262892).

Almost surely, 2^{21051222322130} is an apocalyptic number.

21051222322130 is an abundant number, since it is smaller than the sum of its proper divisors (29825018502958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21051222322130 is a wasteful number, since it uses less digits than its factorization.

21051222322130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103019251.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21051222322130 its reverse (3122322215012), we get a palindrome (24173544537142).

The spelling of 21051222322130 in words is "twenty-one trillion, fifty-one billion, two hundred twenty-two million, three hundred twenty-two thousand, one hundred thirty".