121132731 has 8 divisors (see below), whose sum is σ = 161585424. Its totient is φ = 80717600.

The previous prime is 121132721. The next prime is 121132747. The reversal of 121132731 is 137231121.

It is a happy number.

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 121132731 - 2²⁵ = 87578299 is a prime.

It is a super-2 number, since 2×121132731² = 29346277039036722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121132698 and 121132707.

It is not an unprimeable number, because it can be changed into a prime (121132721) 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, 720 + ... + 15581.

It is an arithmetic number, because the mean of its divisors is an integer number (20198178).

Almost surely, 2^121132731 is an apocalyptic number.

121132731 is a deficient number, since it is larger than the sum of its proper divisors (40452693).

121132731 is a wasteful number, since it uses less digits than its factorization.

121132731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18781.

The product of its digits is 252, while the sum is 21.

The square root of 121132731 is about 11006.0315736418. The cubic root of 121132731 is about 494.7895319914.

Adding to 121132731 its reverse (137231121), we get a palindrome (258363852).

The spelling of 121132731 in words is "one hundred twenty-one million, one hundred thirty-two thousand, seven hundred thirty-one".