121022112181 has 2 divisors, whose sum is σ = 121022112182. Its totient is φ = 121022112180.

The previous prime is 121022112151. The next prime is 121022112221. The reversal of 121022112181 is 181211220121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116765724100 + 4256388081 = 341710^2 + 65241^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022112181 - 2⁹ = 121022111669 is a prime.

It is a super-2 number, since 2×121022112181² (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 (121022112151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511056090 + 60511056091.

It is an arithmetic number, because the mean of its divisors is an integer number (60511056091).

Almost surely, 2^121022112181 is an apocalyptic number.

It is an amenable number.

121022112181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022112181 is an equidigital number, since it uses as much as digits as its factorization.

121022112181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 121022112181 in words is "one hundred twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred eighty-one".