421012099 has 4 divisors (see below), whose sum is σ = 421168000. Its totient is φ = 420856200.

The previous prime is 421012087. The next prime is 421012129. The reversal of 421012099 is 990210124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421012099 - 2⁷ = 421011971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421012069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73827 + ... + 79324.

It is an arithmetic number, because the mean of its divisors is an integer number (105292000).

Almost surely, 2^421012099 is an apocalyptic number.

421012099 is a deficient number, since it is larger than the sum of its proper divisors (155901).

421012099 is a wasteful number, since it uses less digits than its factorization.

421012099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155900.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 421012099 is about 20518.5793611546. The cubic root of 421012099 is about 749.4883022258.

The spelling of 421012099 in words is "four hundred twenty-one million, twelve thousand, ninety-nine".