101111121989 has 2 divisors, whose sum is σ = 101111121990. Its totient is φ = 101111121988.

The previous prime is 101111121967. The next prime is 101111122061. The reversal of 101111121989 is 989121111101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77768476900 + 23342645089 = 278870^2 + 152783^2 .

It is a cyclic number.

It is not a de Polignac number, because 101111121989 - 2²⁸ = 100842686533 is a prime.

It is a super-2 number, since 2×101111121989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101111111989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50555560994 + 50555560995.

It is an arithmetic number, because the mean of its divisors is an integer number (50555560995).

Almost surely, 2^101111121989 is an apocalyptic number.

It is an amenable number.

101111121989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101111121989 is an equidigital number, since it uses as much as digits as its factorization.

101111121989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 35.

The spelling of 101111121989 in words is "one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred eighty-nine".