101122221989 has 2 divisors, whose sum is σ = 101122221990. Its totient is φ = 101122221988.

The previous prime is 101122221973. The next prime is 101122222021. The reversal of 101122221989 is 989122221101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99592629889 + 1529592100 = 315583^2 + 39110^2 .

It is a cyclic number.

It is not a de Polignac number, because 101122221989 - 2⁴ = 101122221973 is a prime.

It is a super-2 number, since 2×101122221989² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101122224989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50561110994 + 50561110995.

It is an arithmetic number, because the mean of its divisors is an integer number (50561110995).

Almost surely, 2^101122221989 is an apocalyptic number.

It is an amenable number.

101122221989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101122221989 is an equidigital number, since it uses as much as digits as its factorization.

101122221989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 101122221989 in words is "one hundred one billion, one hundred twenty-two million, two hundred twenty-one thousand, nine hundred eighty-nine".