20102111201231 has 2 divisors, whose sum is σ = 20102111201232. Its totient is φ = 20102111201230.

The previous prime is 20102111201203. The next prime is 20102111201239. The reversal of 20102111201231 is 13210211120102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20102111201231 - 2³⁴ = 20084931332047 is a prime.

It is a super-2 number, since 2×20102111201231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102111201239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051055600615 + 10051055600616.

It is an arithmetic number, because the mean of its divisors is an integer number (10051055600616).

Almost surely, 2^{20102111201231} is an apocalyptic number.

20102111201231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102111201231 is an equidigital number, since it uses as much as digits as its factorization.

20102111201231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20102111201231 its reverse (13210211120102), we get a palindrome (33312322321333).

The spelling of 20102111201231 in words is "twenty trillion, one hundred two billion, one hundred eleven million, two hundred one thousand, two hundred thirty-one".