121413381 has 16 divisors (see below), whose sum is σ = 167931456. Its totient is φ = 77970816.

The previous prime is 121413379. The next prime is 121413403. The reversal of 121413381 is 183314121.

It is not a de Polignac number, because 121413381 - 2¹ = 121413379 is a prime.

It is a super-2 number, since 2×121413381² = 29482418171702322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121413311) 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, 2971 + ... + 15863.

It is an arithmetic number, because the mean of its divisors is an integer number (10495716).

Almost surely, 2^121413381 is an apocalyptic number.

It is an amenable number.

121413381 is a deficient number, since it is larger than the sum of its proper divisors (46518075).

121413381 is a wasteful number, since it uses less digits than its factorization.

121413381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13012.

The product of its digits is 576, while the sum is 24.

The square root of 121413381 is about 11018.7740243641. The cubic root of 121413381 is about 495.1713599144.

The spelling of 121413381 in words is "one hundred twenty-one million, four hundred thirteen thousand, three hundred eighty-one".