121992385349 has 4 divisors (see below), whose sum is σ = 124587968064. Its totient is φ = 119396802636.

The previous prime is 121992385327. The next prime is 121992385379. The reversal of 121992385349 is 943583299121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121992385349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121992385294 and 121992385303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121992385379) 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, 1297791287 + ... + 1297791380.

It is an arithmetic number, because the mean of its divisors is an integer number (31146992016).

Almost surely, 2^121992385349 is an apocalyptic number.

It is an amenable number.

121992385349 is a deficient number, since it is larger than the sum of its proper divisors (2595582715).

121992385349 is an equidigital number, since it uses as much as digits as its factorization.

121992385349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595582714.

The product of its digits is 4199040, while the sum is 56.

The spelling of 121992385349 in words is "one hundred twenty-one billion, nine hundred ninety-two million, three hundred eighty-five thousand, three hundred forty-nine".