111021001121231 has 2 divisors, whose sum is σ = 111021001121232. Its totient is φ = 111021001121230.

The previous prime is 111021001121189. The next prime is 111021001121237. The reversal of 111021001121231 is 132121100120111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111021001121231 - 2¹⁰ = 111021001120207 is a prime.

It is a super-2 number, since 2×111021001121231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021001121237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510500560615 + 55510500560616.

It is an arithmetic number, because the mean of its divisors is an integer number (55510500560616).

Almost surely, 2^{111021001121231} is an apocalyptic number.

111021001121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021001121231 is an equidigital number, since it uses as much as digits as its factorization.

111021001121231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 111021001121231 its reverse (132121100120111), we get a palindrome (243142101241342).

The spelling of 111021001121231 in words is "one hundred eleven trillion, twenty-one billion, one million, one hundred twenty-one thousand, two hundred thirty-one".