13971774121 has 8 divisors (see below), whose sum is σ = 14625612288. Its totient is φ = 13330632000.

The previous prime is 13971774109. The next prime is 13971774149. The reversal of 13971774121 is 12147717931.

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

It is a cyclic number.

It is not a de Polignac number, because 13971774121 - 2¹⁹ = 13971249833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13971774151) 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, 3171760 + ... + 3176161.

It is an arithmetic number, because the mean of its divisors is an integer number (1828201536).

Almost surely, 2^13971774121 is an apocalyptic number.

It is an amenable number.

13971774121 is a deficient number, since it is larger than the sum of its proper divisors (653838167).

13971774121 is an equidigital number, since it uses as much as digits as its factorization.

13971774121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6348023.

The product of its digits is 74088, while the sum is 43.

The spelling of 13971774121 in words is "thirteen billion, nine hundred seventy-one million, seven hundred seventy-four thousand, one hundred twenty-one".