1023213131111 has 2 divisors, whose sum is σ = 1023213131112. Its totient is φ = 1023213131110.

The previous prime is 1023213131027. The next prime is 1023213131117. The reversal of 1023213131111 is 1111313123201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023213131111 is a prime.

It is a super-2 number, since 2×1023213131111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023213131117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511606565555 + 511606565556.

It is an arithmetic number, because the mean of its divisors is an integer number (511606565556).

Almost surely, 2^{1023213131111} is an apocalyptic number.

1023213131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023213131111 is an equidigital number, since it uses as much as digits as its factorization.

1023213131111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1023213131111 its reverse (1111313123201), we get a palindrome (2134526254312).

The spelling of 1023213131111 in words is "one trillion, twenty-three billion, two hundred thirteen million, one hundred thirty-one thousand, one hundred eleven".