1224442142981 has 2 divisors, whose sum is σ = 1224442142982. Its totient is φ = 1224442142980.

The previous prime is 1224442142929. The next prime is 1224442143011. The reversal of 1224442142981 is 1892412444221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840872494081 + 383569648900 = 916991^2 + 619330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224442142981 - 2³⁴ = 1207262273797 is a prime.

It is a super-2 number, since 2×1224442142981² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224442142281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612221071490 + 612221071491.

It is an arithmetic number, because the mean of its divisors is an integer number (612221071491).

Almost surely, 2^{1224442142981} is an apocalyptic number.

It is an amenable number.

1224442142981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224442142981 is an equidigital number, since it uses as much as digits as its factorization.

1224442142981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294912, while the sum is 44.

The spelling of 1224442142981 in words is "one trillion, two hundred twenty-four billion, four hundred forty-two million, one hundred forty-two thousand, nine hundred eighty-one".