1212273481 has 2 divisors, whose sum is σ = 1212273482. Its totient is φ = 1212273480.

The previous prime is 1212273437. The next prime is 1212273497. The reversal of 1212273481 is 1843722121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163901456 + 48372025 = 34116^2 + 6955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212273481 - 2⁹ = 1212272969 is a prime.

It is a super-2 number, since 2×1212273481² = 2939213985471714722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212273421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606136740 + 606136741.

It is an arithmetic number, because the mean of its divisors is an integer number (606136741).

Almost surely, 2^1212273481 is an apocalyptic number.

It is an amenable number.

1212273481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212273481 is an equidigital number, since it uses as much as digits as its factorization.

1212273481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1212273481 is about 34817.7179177499. The cubic root of 1212273481 is about 1066.2692094172.

The spelling of 1212273481 in words is "one billion, two hundred twelve million, two hundred seventy-three thousand, four hundred eighty-one".