100120051 has 4 divisors (see below), whose sum is σ = 100384600. Its totient is φ = 99855504.

The previous prime is 100120037. The next prime is 100120057. The reversal of 100120051 is 150021001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100120051 - 2⁷ = 100119923 is a prime.

It is a super-2 number, since 2×100120051² = 20048049224485202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100120057) 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, 131706 + ... + 132463.

It is an arithmetic number, because the mean of its divisors is an integer number (25096150).

Almost surely, 2^100120051 is an apocalyptic number.

100120051 is a deficient number, since it is larger than the sum of its proper divisors (264549).

100120051 is an equidigital number, since it uses as much as digits as its factorization.

100120051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264548.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 100120051 is about 10006.0007495502. Note that the first 3 decimals coincide. The cubic root of 100120051 is about 464.3445515426.

Adding to 100120051 its reverse (150021001), we get a palindrome (250141052).

The spelling of 100120051 in words is "one hundred million, one hundred twenty thousand, fifty-one".