20102111069 has 2 divisors, whose sum is σ = 20102111070. Its totient is φ = 20102111068.

The previous prime is 20102111039. The next prime is 20102111111. The reversal of 20102111069 is 96011120102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18533555044 + 1568556025 = 136138^2 + 39605^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102111069 - 2²⁰ = 20101062493 is a prime.

It is a super-2 number, since 2×20102111069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102111039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051055534 + 10051055535.

It is an arithmetic number, because the mean of its divisors is an integer number (10051055535).

Almost surely, 2^20102111069 is an apocalyptic number.

It is an amenable number.

20102111069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102111069 is an equidigital number, since it uses as much as digits as its factorization.

20102111069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 20102111069 in words is "twenty billion, one hundred two million, one hundred eleven thousand, sixty-nine".