121431000 has 128 divisors (see below), whose sum is σ = 401319360. Its totient is φ = 30464000.

The previous prime is 121430993. The next prime is 121431019. The reversal of 121431000 is 134121.

It is a happy number.

It is a super-2 number, since 2×121431000² = 29490975522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49810 + ... + 52190.

Almost surely, 2^121431000 is an apocalyptic number.

121431000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121431000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200659680).

121431000 is an abundant number, since it is smaller than the sum of its proper divisors (279888360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121431000 is a wasteful number, since it uses less digits than its factorization.

121431000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422 (or 2408 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121431000 is about 11019.5734944688. The cubic root of 121431000 is about 495.1953111520.

Adding to 121431000 its reverse (134121), we get a palindrome (121565121).

The spelling of 121431000 in words is "one hundred twenty-one million, four hundred thirty-one thousand".