20102121211231 has 2 divisors, whose sum is σ = 20102121211232. Its totient is φ = 20102121211230.

The previous prime is 20102121211199. The next prime is 20102121211261. The reversal of 20102121211231 is 13211212120102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20102121211231 - 2⁵ = 20102121211199 is a prime.

It is a super-2 number, since 2×20102121211231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102121211199 and 20102121211208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102121211261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051060605615 + 10051060605616.

It is an arithmetic number, because the mean of its divisors is an integer number (10051060605616).

Almost surely, 2^{20102121211231} is an apocalyptic number.

20102121211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102121211231 is an equidigital number, since it uses as much as digits as its factorization.

20102121211231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20102121211231 its reverse (13211212120102), we get a palindrome (33313333331333).

The spelling of 20102121211231 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirty-one".