2091412121 has 2 divisors, whose sum is σ = 2091412122. Its totient is φ = 2091412120.

The previous prime is 2091412079. The next prime is 2091412129. The reversal of 2091412121 is 1212141902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1880436496 + 210975625 = 43364^2 + 14525^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091412121 - 2²⁶ = 2024303257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2091412129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045706060 + 1045706061.

It is an arithmetic number, because the mean of its divisors is an integer number (1045706061).

Almost surely, 2^2091412121 is an apocalyptic number.

It is an amenable number.

2091412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091412121 is an equidigital number, since it uses as much as digits as its factorization.

2091412121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2091412121 is about 45731.9595141079. The cubic root of 2091412121 is about 1278.8311516039.

The spelling of 2091412121 in words is "two billion, ninety-one million, four hundred twelve thousand, one hundred twenty-one".