121100103181 has 2 divisors, whose sum is σ = 121100103182. Its totient is φ = 121100103180.

The previous prime is 121100103149. The next prime is 121100103193. The reversal of 121100103181 is 181301001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66095782281 + 55004320900 = 257091^2 + 234530^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100103181 - 2⁵ = 121100103149 is a prime.

It is a super-2 number, since 2×121100103181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121100103581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550051590 + 60550051591.

It is an arithmetic number, because the mean of its divisors is an integer number (60550051591).

Almost surely, 2^121100103181 is an apocalyptic number.

It is an amenable number.

121100103181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100103181 is an equidigital number, since it uses as much as digits as its factorization.

121100103181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

The spelling of 121100103181 in words is "one hundred twenty-one billion, one hundred million, one hundred three thousand, one hundred eighty-one".