121400013 has 24 divisors (see below), whose sum is σ = 189082432. Its totient is φ = 67869504.

The previous prime is 121399991. The next prime is 121400017. The reversal of 121400013 is 310004121.

It is a happy number.

It is not a de Polignac number, because 121400013 - 2⁹ = 121399501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45081 + ... + 47697.

Almost surely, 2^121400013 is an apocalyptic number.

It is an amenable number.

121400013 is a deficient number, since it is larger than the sum of its proper divisors (67682419).

121400013 is an equidigital number, since it uses as much as digits as its factorization.

121400013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2674 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121400013 is about 11018.1674066062. The cubic root of 121400013 is about 495.1531859327.

Adding to 121400013 its reverse (310004121), we get a palindrome (431404134).

The spelling of 121400013 in words is "one hundred twenty-one million, four hundred thousand, thirteen".