21202341031 has 2 divisors, whose sum is σ = 21202341032. Its totient is φ = 21202341030.

The previous prime is 21202341023. The next prime is 21202341047. The reversal of 21202341031 is 13014320212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202341031 - 2³ = 21202341023 is a prime.

It is a super-2 number, since 2×21202341031² (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 (21202341001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601170515 + 10601170516.

It is an arithmetic number, because the mean of its divisors is an integer number (10601170516).

Almost surely, 2^21202341031 is an apocalyptic number.

21202341031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202341031 is an equidigital number, since it uses as much as digits as its factorization.

21202341031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21202341031 its reverse (13014320212), we get a palindrome (34216661243).

The spelling of 21202341031 in words is "twenty-one billion, two hundred two million, three hundred forty-one thousand, thirty-one".