121421430 has 120 divisors (see below), whose sum is σ = 353933712. Its totient is φ = 29854656.

The previous prime is 121421423. The next prime is 121421453. The reversal of 121421430 is 34124121.

121421430 is a `hidden beast` number, since 1 + 214 + 21 + 430 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 136447 + ... + 137333.

Almost surely, 2^121421430 is an apocalyptic number.

121421430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121421430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176966856).

121421430 is an abundant number, since it is smaller than the sum of its proper divisors (232512282).

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

121421430 is a wasteful number, since it uses less digits than its factorization.

121421430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121421430 is about 11019.1392585810. The cubic root of 121421430 is about 495.1823019983.

Adding to 121421430 its reverse (34124121), we get a palindrome (155545551).

The spelling of 121421430 in words is "one hundred twenty-one million, four hundred twenty-one thousand, four hundred thirty".