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120102421 is a prime number
BaseRepresentation
bin1110010100010…
…01111000010101
322100222211112211
413022021320111
5221221234141
615530113421
72655565555
oct712117025
9270884484
10120102421
11618817aa
123427b871
131bb6172a
1411d45165
15a825d81
hex7289e15

120102421 has 2 divisors, whose sum is σ = 120102422. Its totient is φ = 120102420.

The previous prime is 120102403. The next prime is 120102431. The reversal of 120102421 is 124201021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79014321 + 41088100 = 8889^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 120102421 - 29 = 120101909 is a prime.

It is a super-2 number, since 2×1201024212 = 28849183060122482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120102431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60051210 + 60051211.

It is an arithmetic number, because the mean of its divisors is an integer number (60051211).

Almost surely, 2120102421 is an apocalyptic number.

It is an amenable number.

120102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

120102421 is an equidigital number, since it uses as much as digits as its factorization.

120102421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 120102421 is about 10959.1250106931. The cubic root of 120102421 is about 493.3827037982.

Adding to 120102421 its reverse (124201021), we get a palindrome (244303442).

The spelling of 120102421 in words is "one hundred twenty million, one hundred two thousand, four hundred twenty-one".