12511142121 has 8 divisors (see below), whose sum is σ = 16686809440. Its totient is φ = 8338118112.

The previous prime is 12511142107. The next prime is 12511142131. The reversal of 12511142121 is 12124111521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12511142121 - 2⁵ = 12511142089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12511142101) 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, 649756 + ... + 668733.

It is an arithmetic number, because the mean of its divisors is an integer number (2085851180).

Almost surely, 2^12511142121 is an apocalyptic number.

It is an amenable number.

12511142121 is a deficient number, since it is larger than the sum of its proper divisors (4175667319).

12511142121 is a wasteful number, since it uses less digits than its factorization.

12511142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321655.

The product of its digits is 160, while the sum is 21.

Adding to 12511142121 its reverse (12124111521), we get a palindrome (24635253642).

The spelling of 12511142121 in words is "twelve billion, five hundred eleven million, one hundred forty-two thousand, one hundred twenty-one".