120311421 has 4 divisors (see below), whose sum is σ = 160415232. Its totient is φ = 80207612.

The previous prime is 120311419. The next prime is 120311423. The reversal of 120311421 is 124113021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124113021 = 3 ⋅41371007.

It is an interprime number because it is at equal distance from previous prime (120311419) and next prime (120311423).

It is a cyclic number.

It is not a de Polignac number, because 120311421 - 2¹ = 120311419 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120311421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120311423) 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, 20051901 + ... + 20051906.

It is an arithmetic number, because the mean of its divisors is an integer number (40103808).

Almost surely, 2^120311421 is an apocalyptic number.

It is an amenable number.

120311421 is a deficient number, since it is larger than the sum of its proper divisors (40103811).

120311421 is an equidigital number, since it uses as much as digits as its factorization.

120311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40103810.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 120311421 is about 10968.6562987451. The cubic root of 120311421 is about 493.6687297526.

Adding to 120311421 its reverse (124113021), we get a palindrome (244424442).

The spelling of 120311421 in words is "one hundred twenty million, three hundred eleven thousand, four hundred twenty-one".