21121122212130 has 32 divisors (see below), whose sum is σ = 50702590047168. Its totient is φ = 5630977396800.

The previous prime is 21121122212123. The next prime is 21121122212149. The reversal of 21121122212130 is 3121222112112.

It is a super-2 number, since 2×21121122212130² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121122212097 and 21121122212106.

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, 82486276 + ... + 82741935.

It is an arithmetic number, because the mean of its divisors is an integer number (1584455938974).

Almost surely, 2^{21121122212130} is an apocalyptic number.

21121122212130 is an abundant number, since it is smaller than the sum of its proper divisors (29581467835038).

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

21121122212130 is a wasteful number, since it uses less digits than its factorization.

21121122212130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165232482.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21121122212130 its reverse (3121222112112), we get a palindrome (24242344324242).

The spelling of 21121122212130 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, one hundred thirty".