21130232212122 has 96 divisors (see below), whose sum is σ = 46931527077120. Its totient is φ = 6336997392000.

The previous prime is 21130232212099. The next prime is 21130232212123. The reversal of 21130232212122 is 22121223203112.

It is a junction number, because it is equal to n+sod(n) for n = 21130232212092 and 21130232212101.

It is not an unprimeable number, because it can be changed into a prime (21130232212123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175115503 + ... + 175236125.

It is an arithmetic number, because the mean of its divisors is an integer number (488870073720).

Almost surely, 2^{21130232212122} is an apocalyptic number.

21130232212122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21130232212122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23465763538560).

21130232212122 is an abundant number, since it is smaller than the sum of its proper divisors (25801294864998).

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

21130232212122 is a wasteful number, since it uses less digits than its factorization.

21130232212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123140 (or 123129 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21130232212122 its reverse (22121223203112), we get a palindrome (43251455415234).

The spelling of 21130232212122 in words is "twenty-one trillion, one hundred thirty billion, two hundred thirty-two million, two hundred twelve thousand, one hundred twenty-two".