1212023081 has 2 divisors, whose sum is σ = 1212023082. Its totient is φ = 1212023080.

The previous prime is 1212023039. The next prime is 1212023083. The reversal of 1212023081 is 1803202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209648400 + 2374681 = 34780^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212023081 - 2³⁰ = 138281257 is a prime.

It is a super-2 number, since 2×1212023081² = 2937999897753465122, which contains 22 as substring.

Together with 1212023083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212023083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606011540 + 606011541.

It is an arithmetic number, because the mean of its divisors is an integer number (606011541).

Almost surely, 2^1212023081 is an apocalyptic number.

It is an amenable number.

1212023081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212023081 is an equidigital number, since it uses as much as digits as its factorization.

1212023081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1212023081 is about 34814.1218616814. The cubic root of 1212023081 is about 1066.1957902866.

It can be divided in two parts, 121 and 2023081, that added together give a palindrome (2023202).

The spelling of 1212023081 in words is "one billion, two hundred twelve million, twenty-three thousand, eighty-one".