121487831 has 8 divisors (see below), whose sum is σ = 129190464. Its totient is φ = 113847040.

The previous prime is 121487813. The next prime is 121487833. The reversal of 121487831 is 138784121.

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 121487831 - 2²⁶ = 54378967 is a prime.

It is a super-2 number, since 2×121487831² = 29518586162169122, 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 = 121487791 and 121487800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121487833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11375 + ... + 19296.

It is an arithmetic number, because the mean of its divisors is an integer number (16148808).

Almost surely, 2^121487831 is an apocalyptic number.

121487831 is a deficient number, since it is larger than the sum of its proper divisors (7702633).

121487831 is a wasteful number, since it uses less digits than its factorization.

121487831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30921.

The product of its digits is 10752, while the sum is 35.

The square root of 121487831 is about 11022.1518316525. The cubic root of 121487831 is about 495.2725513283.

The spelling of 121487831 in words is "one hundred twenty-one million, four hundred eighty-seven thousand, eight hundred thirty-one".