13212123722121 has 16 divisors (see below), whose sum is σ = 17686786712000. Its totient is φ = 8772829167168.

The previous prime is 13212123722101. The next prime is 13212123722201. The reversal of 13212123722121 is 12122732121231.

It is not a de Polignac number, because 13212123722121 - 2⁹ = 13212123721609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13212123722101) 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, 6276211 + ... + 8112648.

It is an arithmetic number, because the mean of its divisors is an integer number (1105424169500).

Almost surely, 2^{13212123722121} is an apocalyptic number.

It is an amenable number.

13212123722121 is a deficient number, since it is larger than the sum of its proper divisors (4474662989879).

13212123722121 is a wasteful number, since it uses less digits than its factorization.

13212123722121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14390088.

The product of its digits is 4032, while the sum is 30.

Adding to 13212123722121 its reverse (12122732121231), we get a palindrome (25334855843352).

The spelling of 13212123722121 in words is "thirteen trillion, two hundred twelve billion, one hundred twenty-three million, seven hundred twenty-two thousand, one hundred twenty-one".