121211010112081 has 2 divisors, whose sum is σ = 121211010112082. Its totient is φ = 121211010112080.

The previous prime is 121211010112079. The next prime is 121211010112139. The reversal of 121211010112081 is 180211010112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107675902890000 + 13535107222081 = 10376700^2 + 3679009^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211010112081 - 2¹ = 121211010112079 is a prime.

It is a super-2 number, since 2×121211010112081² (a number of 29 digits) contains 22 as substring.

Together with 121211010112079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121211010212081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605505056040 + 60605505056041.

It is an arithmetic number, because the mean of its divisors is an integer number (60605505056041).

Almost surely, 2^{121211010112081} is an apocalyptic number.

It is an amenable number.

121211010112081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211010112081 is an equidigital number, since it uses as much as digits as its factorization.

121211010112081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 22.

The spelling of 121211010112081 in words is "one hundred twenty-one trillion, two hundred eleven billion, ten million, one hundred twelve thousand, eighty-one".