100612021 has 2 divisors, whose sum is σ = 100612022. Its totient is φ = 100612020.

The previous prime is 100612003. The next prime is 100612033. The reversal of 100612021 is 120216001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80460900 + 20151121 = 8970^2 + 4489^2 .

It is an emirp because it is prime and its reverse (120216001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100612021 - 2¹⁹ = 100087733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100611992 and 100612010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100612621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50306010 + 50306011.

It is an arithmetic number, because the mean of its divisors is an integer number (50306011).

Almost surely, 2^100612021 is an apocalyptic number.

It is an amenable number.

100612021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100612021 is an equidigital number, since it uses as much as digits as its factorization.

100612021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 100612021 is about 10030.5543715191. The cubic root of 100612021 is about 465.1038747399.

Adding to 100612021 its reverse (120216001), we get a palindrome (220828022).

The spelling of 100612021 in words is "one hundred million, six hundred twelve thousand, twenty-one".