20100020021231 has 2 divisors, whose sum is σ = 20100020021232. Its totient is φ = 20100020021230.

The previous prime is 20100020021183. The next prime is 20100020021273. The reversal of 20100020021231 is 13212002000102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20100020021231 - 2²⁶ = 20099952912367 is a prime.

It is a super-2 number, since 2×20100020021231² (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 (20100020020231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050010010615 + 10050010010616.

It is an arithmetic number, because the mean of its divisors is an integer number (10050010010616).

Almost surely, 2^{20100020021231} is an apocalyptic number.

20100020021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100020021231 is an equidigital number, since it uses as much as digits as its factorization.

20100020021231 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 14.

Adding to 20100020021231 its reverse (13212002000102), we get a palindrome (33312022021333).

The spelling of 20100020021231 in words is "twenty trillion, one hundred billion, twenty million, twenty-one thousand, two hundred thirty-one".