101202020111989 has 2 divisors, whose sum is σ = 101202020111990. Its totient is φ = 101202020111988.

The previous prime is 101202020111987. The next prime is 101202020112019. The reversal of 101202020111989 is 989111020202101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68105126171889 + 33096893940100 = 8252583^2 + 5752990^2 .

It is a cyclic number.

It is not a de Polignac number, because 101202020111989 - 2¹ = 101202020111987 is a prime.

It is a super-2 number, since 2×101202020111989² (a number of 29 digits) contains 22 as substring.

Together with 101202020111987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101202020111987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50601010055994 + 50601010055995.

It is an arithmetic number, because the mean of its divisors is an integer number (50601010055995).

Almost surely, 2^{101202020111989} is an apocalyptic number.

It is an amenable number.

101202020111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101202020111989 is an equidigital number, since it uses as much as digits as its factorization.

101202020111989 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 101202020111989 in words is "one hundred one trillion, two hundred two billion, twenty million, one hundred eleven thousand, nine hundred eighty-nine".