109492121021 has 2 divisors, whose sum is σ = 109492121022. Its totient is φ = 109492121020.

The previous prime is 109492120967. The next prime is 109492121027. The reversal of 109492121021 is 120121294901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81347025796 + 28145095225 = 285214^2 + 167765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109492121021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109492121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54746060510 + 54746060511.

It is an arithmetic number, because the mean of its divisors is an integer number (54746060511).

Almost surely, 2^109492121021 is an apocalyptic number.

It is an amenable number.

109492121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

109492121021 is an equidigital number, since it uses as much as digits as its factorization.

109492121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 109492121021 in words is "one hundred nine billion, four hundred ninety-two million, one hundred twenty-one thousand, twenty-one".