121455611011 has 12 divisors (see below), whose sum is σ = 141296571768. Its totient is φ = 104096355552.

The previous prime is 121455611009. The next prime is 121455611027. The reversal of 121455611011 is 110116554121.

It is not a de Polignac number, because 121455611011 - 2¹ = 121455611009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121455611311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551620 + ... + 739726.

It is an arithmetic number, because the mean of its divisors is an integer number (11774714314).

Almost surely, 2^121455611011 is an apocalyptic number.

121455611011 is a deficient number, since it is larger than the sum of its proper divisors (19840960757).

121455611011 is a wasteful number, since it uses less digits than its factorization.

121455611011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201298 (or 201291 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 28.

The spelling of 121455611011 in words is "one hundred twenty-one billion, four hundred fifty-five million, six hundred eleven thousand, eleven".