13121222222121 has 8 divisors (see below), whose sum is σ = 18840729344640. Its totient is φ = 8074598290512.

The previous prime is 13121222222099. The next prime is 13121222222167. The reversal of 13121222222121 is 12122222212131.

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

It is not a de Polignac number, because 13121222222121 - 2⁵ = 13121222222089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13121222222091 and 13121222222100.

It is not an unprimeable number, because it can be changed into a prime (13121222223121) 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, 168220797681 + ... + 168220797758.

It is an arithmetic number, because the mean of its divisors is an integer number (2355091168080).

Almost surely, 2^{13121222222121} is an apocalyptic number.

It is an amenable number.

13121222222121 is a deficient number, since it is larger than the sum of its proper divisors (5719507122519).

13121222222121 is a wasteful number, since it uses less digits than its factorization.

13121222222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336441595455.

The product of its digits is 768, while the sum is 24.

Adding to 13121222222121 its reverse (12122222212131), we get a palindrome (25243444434252).

The spelling of 13121222222121 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".