113121101 has 2 divisors, whose sum is σ = 113121102. Its totient is φ = 113121100.

The previous prime is 113121053. The next prime is 113121103. The reversal of 113121101 is 101121311.

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., 64818601 + 48302500 = 8051^2 + 6950^2 .

It is an emirp because it is prime and its reverse (101121311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113121101 - 2²⁶ = 46012237 is a prime.

Together with 113121103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56560550 + 56560551.

It is an arithmetic number, because the mean of its divisors is an integer number (56560551).

Almost surely, 2^113121101 is an apocalyptic number.

It is an amenable number.

113121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

113121101 is an equidigital number, since it uses as much as digits as its factorization.

113121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 113121101 is about 10635.8403993291. The cubic root of 113121101 is about 483.6314570865.

Adding to 113121101 its reverse (101121311), we get a palindrome (214242412).

The spelling of 113121101 in words is "one hundred thirteen million, one hundred twenty-one thousand, one hundred one".