13120421121403 has 16 divisors (see below), whose sum is σ = 13641559658496. Its totient is φ = 12605730858720.

The previous prime is 13120421121397. The next prime is 13120421121407. The reversal of 13120421121403 is 30412112402131.

It is a cyclic number.

It is not a de Polignac number, because 13120421121403 - 2²⁵ = 13120387566971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13120421121407) 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, 357375 + ... + 5135032.

It is an arithmetic number, because the mean of its divisors is an integer number (852597478656).

Almost surely, 2^{13120421121403} is an apocalyptic number.

13120421121403 is a deficient number, since it is larger than the sum of its proper divisors (521138537093).

13120421121403 is a wasteful number, since it uses less digits than its factorization.

13120421121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492994.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 13120421121403 its reverse (30412112402131), we get a palindrome (43532533523534).

The spelling of 13120421121403 in words is "thirteen trillion, one hundred twenty billion, four hundred twenty-one million, one hundred twenty-one thousand, four hundred three".