100121251 has 2 divisors, whose sum is σ = 100121252. Its totient is φ = 100121250.

The previous prime is 100121237. The next prime is 100121257. The reversal of 100121251 is 152121001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100121251 - 2⁷ = 100121123 is a prime.

It is not a weakly prime, because it can be changed into another prime (100121257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060625 + 50060626.

It is an arithmetic number, because the mean of its divisors is an integer number (50060626).

Almost surely, 2^100121251 is an apocalyptic number.

100121251 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121251 is an equidigital number, since it uses as much as digits as its factorization.

100121251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 100121251 is about 10006.0607133877. The cubic root of 100121251 is about 464.3464066863.

Adding to 100121251 its reverse (152121001), we get a palindrome (252242252).

The spelling of 100121251 in words is "one hundred million, one hundred twenty-one thousand, two hundred fifty-one".