121361731 has 8 divisors (see below), whose sum is σ = 126764064. Its totient is φ = 115969920.

The previous prime is 121361693. The next prime is 121361783. The reversal of 121361731 is 137163121.

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 121361731 - 2¹⁹ = 120837443 is a prime.

It is a super-2 number, since 2×121361731² = 29457339502632722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121361696 and 121361705.

It is not an unprimeable number, because it can be changed into a prime (121361131) 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, 29365 + ... + 33241.

It is an arithmetic number, because the mean of its divisors is an integer number (15845508).

Almost surely, 2^121361731 is an apocalyptic number.

121361731 is a deficient number, since it is larger than the sum of its proper divisors (5402333).

121361731 is a wasteful number, since it uses less digits than its factorization.

121361731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261.

The product of its digits is 756, while the sum is 25.

The square root of 121361731 is about 11016.4300478876. The cubic root of 121361731 is about 495.1011336399.

The spelling of 121361731 in words is "one hundred twenty-one million, three hundred sixty-one thousand, seven hundred thirty-one".