21202411031 has 2 divisors, whose sum is σ = 21202411032. Its totient is φ = 21202411030.

The previous prime is 21202410991. The next prime is 21202411073. The reversal of 21202411031 is 13011420212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202411031 is a prime.

It is a super-2 number, since 2×21202411031² (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 (21202413031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601205515 + 10601205516.

It is an arithmetic number, because the mean of its divisors is an integer number (10601205516).

Almost surely, 2^21202411031 is an apocalyptic number.

21202411031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202411031 is an equidigital number, since it uses as much as digits as its factorization.

21202411031 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 17.

Adding to 21202411031 its reverse (13011420212), we get a palindrome (34213831243).

The spelling of 21202411031 in words is "twenty-one billion, two hundred two million, four hundred eleven thousand, thirty-one".