43901930121 has 8 divisors (see below), whose sum is σ = 66898179264. Its totient is φ = 25086817200.

The previous prime is 43901930113. The next prime is 43901930123. The reversal of 43901930121 is 12103910934.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43901930121 - 2³ = 43901930113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43901930123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045284030 + ... + 1045284071.

It is an arithmetic number, because the mean of its divisors is an integer number (8362272408).

Almost surely, 2^43901930121 is an apocalyptic number.

It is an amenable number.

43901930121 is a deficient number, since it is larger than the sum of its proper divisors (22996249143).

43901930121 is a wasteful number, since it uses less digits than its factorization.

43901930121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090568111.

The product of its (nonzero) digits is 5832, while the sum is 33.

The spelling of 43901930121 in words is "forty-three billion, nine hundred one million, nine hundred thirty thousand, one hundred twenty-one".