1011212231 has 2 divisors, whose sum is σ = 1011212232. Its totient is φ = 1011212230.

The previous prime is 1011212177. The next prime is 1011212249. The reversal of 1011212231 is 1322121101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011212231 is a prime.

It is a super-2 number, since 2×1011212231² = 2045100352247994722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011212261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505606115 + 505606116.

It is an arithmetic number, because the mean of its divisors is an integer number (505606116).

Almost surely, 2^1011212231 is an apocalyptic number.

1011212231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011212231 is an equidigital number, since it uses as much as digits as its factorization.

1011212231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1011212231 is about 31799.5633775057. The cubic root of 1011212231 is about 1003.7235284606.

Adding to 1011212231 its reverse (1322121101), we get a palindrome (2333333332).

The spelling of 1011212231 in words is "one billion, eleven million, two hundred twelve thousand, two hundred thirty-one".