2131223121120 has 192 divisors, whose sum is σ = 6761872353600. Its totient is φ = 564222640128.

The previous prime is 2131223121119. The next prime is 2131223121149. The reversal of 2131223121120 is 211213221312.

It is a super-2 number, since 2×2131223121120² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164274954 + ... + 164287926.

It is an arithmetic number, because the mean of its divisors is an integer number (35218085175).

Almost surely, 2^{2131223121120} is an apocalyptic number.

2131223121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131223121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3380936176800).

2131223121120 is an abundant number, since it is smaller than the sum of its proper divisors (4630649232480).

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

2131223121120 is a wasteful number, since it uses less digits than its factorization.

2131223121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15437 (or 15429 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2131223121120 its reverse (211213221312), we get a palindrome (2342436342432).

The spelling of 2131223121120 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred twenty-one thousand, one hundred twenty".