2123131300121 has 16 divisors (see below), whose sum is σ = 2390143521024. Its totient is φ = 1871238540864.

The previous prime is 2123131300117. The next prime is 2123131300247. The reversal of 2123131300121 is 1210031313212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2123131300121 - 2² = 2123131300117 is a prime.

It is a super-2 number, since 2×2123131300121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123131300093 and 2123131300102.

It is not an unprimeable number, because it can be changed into a prime (2123131300111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6207581 + ... + 6540666.

It is an arithmetic number, because the mean of its divisors is an integer number (149383970064).

Almost surely, 2^{2123131300121} is an apocalyptic number.

It is an amenable number.

2123131300121 is a deficient number, since it is larger than the sum of its proper divisors (267012220903).

2123131300121 is a wasteful number, since it uses less digits than its factorization.

2123131300121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12748840.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2123131300121 its reverse (1210031313212), we get a palindrome (3333162613333).

The spelling of 2123131300121 in words is "two trillion, one hundred twenty-three billion, one hundred thirty-one million, three hundred thousand, one hundred twenty-one".