111012201220961 has 2 divisors, whose sum is σ = 111012201220962. Its totient is φ = 111012201220960.

The previous prime is 111012201220957. The next prime is 111012201220997. The reversal of 111012201220961 is 169022102210111.

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., 90842725011025 + 20169476209936 = 9531145^2 + 4491044^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012201220961 - 2² = 111012201220957 is a prime.

It is not a weakly prime, because it can be changed into another prime (111012201220561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506100610480 + 55506100610481.

It is an arithmetic number, because the mean of its divisors is an integer number (55506100610481).

Almost surely, 2^{111012201220961} is an apocalyptic number.

It is an amenable number.

111012201220961 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012201220961 is an equidigital number, since it uses as much as digits as its factorization.

111012201220961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 111012201220961 in words is "one hundred eleven trillion, twelve billion, two hundred one million, two hundred twenty thousand, nine hundred sixty-one".