120091421 has 2 divisors, whose sum is σ = 120091422. Its totient is φ = 120091420.

The previous prime is 120091409. The next prime is 120091423. The reversal of 120091421 is 124190021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 30580900 = 9461^2 + 5530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120091421 is a prime.

Together with 120091423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120091393 and 120091402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120091423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60045710 + 60045711.

It is an arithmetic number, because the mean of its divisors is an integer number (60045711).

Almost surely, 2^120091421 is an apocalyptic number.

It is an amenable number.

120091421 is a deficient number, since it is larger than the sum of its proper divisors (1).

120091421 is an equidigital number, since it uses as much as digits as its factorization.

120091421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 120091421 is about 10958.6231343176. The cubic root of 120091421 is about 493.3676406119.

The spelling of 120091421 in words is "one hundred twenty million, ninety-one thousand, four hundred twenty-one".