2123133121220 has 24 divisors (see below), whose sum is σ = 4458683880000. Its totient is φ = 849233376992.

The previous prime is 2123133121199. The next prime is 2123133121229. The reversal of 2123133121220 is 221213313212.

It is not an unprimeable number, because it can be changed into a prime (2123133121229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350240 + ... + 2090199.

It is an arithmetic number, because the mean of its divisors is an integer number (185778495000).

Almost surely, 2^{2123133121220} is an apocalyptic number.

2123133121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123133121220 is an abundant number, since it is smaller than the sum of its proper divisors (2335550758780).

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

2123133121220 is a wasteful number, since it uses less digits than its factorization.

2123133121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483947 (or 2483945 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2123133121220 its reverse (221213313212), we get a palindrome (2344346434432).

The spelling of 2123133121220 in words is "two trillion, one hundred twenty-three billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty".