121100012201989 has 2 divisors, whose sum is σ = 121100012201990. Its totient is φ = 121100012201988.

The previous prime is 121100012201951. The next prime is 121100012202097. The reversal of 121100012201989 is 989102210001121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108692780889889 + 12407231312100 = 10425583^2 + 3522390^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100012201989 - 2⁴⁵ = 85915640113157 is a prime.

It is a super-2 number, since 2×121100012201989² (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 (121100018201989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550006100994 + 60550006100995.

It is an arithmetic number, because the mean of its divisors is an integer number (60550006100995).

Almost surely, 2^{121100012201989} is an apocalyptic number.

It is an amenable number.

121100012201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100012201989 is an equidigital number, since it uses as much as digits as its factorization.

121100012201989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 121100012201989 in words is "one hundred twenty-one trillion, one hundred billion, twelve million, two hundred one thousand, nine hundred eighty-nine".