121349381 has 16 divisors (see below), whose sum is σ = 128701440. Its totient is φ = 114261120.

The previous prime is 121349377. The next prime is 121349411. The reversal of 121349381 is 183943121.

It is a cyclic number.

It is not a de Polignac number, because 121349381 - 2² = 121349377 is a prime.

It is a super-2 number, since 2×121349381² = 29451344538166322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121349321) 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, 253100 + ... + 253578.

It is an arithmetic number, because the mean of its divisors is an integer number (8043840).

Almost surely, 2^121349381 is an apocalyptic number.

It is an amenable number.

121349381 is a deficient number, since it is larger than the sum of its proper divisors (7352059).

121349381 is a wasteful number, since it uses less digits than its factorization.

121349381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its digits is 5184, while the sum is 32.

The square root of 121349381 is about 11015.8695072155. The cubic root of 121349381 is about 495.0843389267.

The spelling of 121349381 in words is "one hundred twenty-one million, three hundred forty-nine thousand, three hundred eighty-one".