61211120099 has 2 divisors, whose sum is σ = 61211120100. Its totient is φ = 61211120098.

The previous prime is 61211120083. The next prime is 61211120107. The reversal of 61211120099 is 99002111216.

61211120099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61211120099 - 2⁴ = 61211120083 is a prime.

It is not a weakly prime, because it can be changed into another prime (61211120059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30605560049 + 30605560050.

It is an arithmetic number, because the mean of its divisors is an integer number (30605560050).

Almost surely, 2^61211120099 is an apocalyptic number.

61211120099 is a deficient number, since it is larger than the sum of its proper divisors (1).

61211120099 is an equidigital number, since it uses as much as digits as its factorization.

61211120099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 61211120099 in words is "sixty-one billion, two hundred eleven million, one hundred twenty thousand, ninety-nine".