13112002121 has 4 divisors (see below), whose sum is σ = 13228037652. Its totient is φ = 12995966592.

The previous prime is 13112002093. The next prime is 13112002133. The reversal of 13112002121 is 12120021131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5532384400 + 7579617721 = 74380^2 + 87061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13112002121 is a prime.

It is a super-2 number, since 2×13112002121² (a number of 21 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 = 13112002096 and 13112002105.

It is not an unprimeable number, because it can be changed into a prime (13112002921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58017596 + ... + 58017821.

It is an arithmetic number, because the mean of its divisors is an integer number (3307009413).

Almost surely, 2^13112002121 is an apocalyptic number.

It is an amenable number.

13112002121 is a deficient number, since it is larger than the sum of its proper divisors (116035531).

13112002121 is a wasteful number, since it uses less digits than its factorization.

13112002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116035530.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 13112002121 its reverse (12120021131), we get a palindrome (25232023252).

The spelling of 13112002121 in words is "thirteen billion, one hundred twelve million, two thousand, one hundred twenty-one".