100121911 has 2 divisors, whose sum is σ = 100121912. Its totient is φ = 100121910.

The previous prime is 100121897. The next prime is 100121939. The reversal of 100121911 is 119121001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060955 + 50060956.

It is an arithmetic number, because the mean of its divisors is an integer number (50060956).

Almost surely, 2^100121911 is an apocalyptic number.

100121911 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121911 is an equidigital number, since it uses as much as digits as its factorization.

100121911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 100121911 is about 10006.0936933451. The cubic root of 100121911 is about 464.3474270090.

Adding to 100121911 its reverse (119121001), we get a palindrome (219242912).

The spelling of 100121911 in words is "one hundred million, one hundred twenty-one thousand, nine hundred eleven".