20001241231 has 2 divisors, whose sum is σ = 20001241232. Its totient is φ = 20001241230.

The previous prime is 20001241151. The next prime is 20001241243. The reversal of 20001241231 is 13214210002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001241231 - 2¹⁷ = 20001110159 is a prime.

It is a super-2 number, since 2×20001241231² (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 (20001241291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000620615 + 10000620616.

It is an arithmetic number, because the mean of its divisors is an integer number (10000620616).

Almost surely, 2^20001241231 is an apocalyptic number.

20001241231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001241231 is an equidigital number, since it uses as much as digits as its factorization.

20001241231 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 16.

Adding to 20001241231 its reverse (13214210002), we get a palindrome (33215451233).

The spelling of 20001241231 in words is "twenty billion, one million, two hundred forty-one thousand, two hundred thirty-one".