21201102313031 has 2 divisors, whose sum is σ = 21201102313032. Its totient is φ = 21201102313030.

The previous prime is 21201102312991. The next prime is 21201102313033. The reversal of 21201102313031 is 13031320110212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201102313031 - 2³⁴ = 21183922443847 is a prime.

It is a super-2 number, since 2×21201102313031² (a number of 27 digits) contains 22 as substring.

Together with 21201102313033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201102312994 and 21201102313012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201102313033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600551156515 + 10600551156516.

It is an arithmetic number, because the mean of its divisors is an integer number (10600551156516).

Almost surely, 2^{21201102313031} is an apocalyptic number.

21201102313031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201102313031 is an equidigital number, since it uses as much as digits as its factorization.

21201102313031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21201102313031 its reverse (13031320110212), we get a palindrome (34232422423243).

The spelling of 21201102313031 in words is "twenty-one trillion, two hundred one billion, one hundred two million, three hundred thirteen thousand, thirty-one".