100121022201989 has 2 divisors, whose sum is σ = 100121022201990. Its totient is φ = 100121022201988.

The previous prime is 100121022201917. The next prime is 100121022202139. The reversal of 100121022201989 is 989102220121001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94050563933089 + 6070458268900 = 9697967^2 + 2463830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121022201989 is a prime.

It is a super-2 number, since 2×100121022201989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121022201089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060511100994 + 50060511100995.

It is an arithmetic number, because the mean of its divisors is an integer number (50060511100995).

Almost surely, 2^{100121022201989} is an apocalyptic number.

It is an amenable number.

100121022201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121022201989 is an equidigital number, since it uses as much as digits as its factorization.

100121022201989 is an evil number, because the sum of its binary digits is even.

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

The spelling of 100121022201989 in words is "one hundred trillion, one hundred twenty-one billion, twenty-two million, two hundred one thousand, nine hundred eighty-nine".