21211130331031 has 2 divisors, whose sum is σ = 21211130331032. Its totient is φ = 21211130331030.

The previous prime is 21211130330969. The next prime is 21211130331067. The reversal of 21211130331031 is 13013303111212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211130331031 - 2⁷ = 21211130330903 is a prime.

It is a super-2 number, since 2×21211130331031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211130330993 and 21211130331011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211130331331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605565165515 + 10605565165516.

It is an arithmetic number, because the mean of its divisors is an integer number (10605565165516).

Almost surely, 2^{21211130331031} is an apocalyptic number.

21211130331031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211130331031 is an equidigital number, since it uses as much as digits as its factorization.

21211130331031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21211130331031 its reverse (13013303111212), we get a palindrome (34224433442243).

The spelling of 21211130331031 in words is "twenty-one trillion, two hundred eleven billion, one hundred thirty million, three hundred thirty-one thousand, thirty-one".