121251430 has 16 divisors (see below), whose sum is σ = 218394864. Its totient is φ = 48468960.

The previous prime is 121251419. The next prime is 121251451. The reversal of 121251430 is 34152121.

It is a junction number, because it is equal to n+sod(n) for n = 121251398 and 121251407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17920 + ... + 23740.

It is an arithmetic number, because the mean of its divisors is an integer number (13649679).

Almost surely, 2^121251430 is an apocalyptic number.

121251430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121251430 is a deficient number, since it is larger than the sum of its proper divisors (97143434).

121251430 is a wasteful number, since it uses less digits than its factorization.

121251430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121251430 is about 11011.4227055363. The cubic root of 121251430 is about 494.9510953964.

The spelling of 121251430 in words is "one hundred twenty-one million, two hundred fifty-one thousand, four hundred thirty".