1212233531 has 2 divisors, whose sum is σ = 1212233532. Its totient is φ = 1212233530.

The previous prime is 1212233413. The next prime is 1212233537. The reversal of 1212233531 is 1353322121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212233531 is a prime.

It is a super-2 number, since 2×1212233531² = 2939020267361455922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212233497 and 1212233506.

It is not a weakly prime, because it can be changed into another prime (1212233537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606116765 + 606116766.

It is an arithmetic number, because the mean of its divisors is an integer number (606116766).

Almost surely, 2^1212233531 is an apocalyptic number.

1212233531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212233531 is an equidigital number, since it uses as much as digits as its factorization.

1212233531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 1212233531 is about 34817.1442108626. The cubic root of 1212233531 is about 1066.2574964598.

Adding to 1212233531 its reverse (1353322121), we get a palindrome (2565555652).

The spelling of 1212233531 in words is "one billion, two hundred twelve million, two hundred thirty-three thousand, five hundred thirty-one".