1204223981 has 2 divisors, whose sum is σ = 1204223982. Its totient is φ = 1204223980.

The previous prime is 1204223959. The next prime is 1204224013. The reversal of 1204223981 is 1893224021.

It is an a-pointer prime, because the next prime (1204224013) can be obtained adding 1204223981 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004256100 + 199967881 = 31690^2 + 14141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1204223981 is a prime.

It is a super-2 number, since 2×1204223981² = 2900310792830976722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204228981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602111990 + 602111991.

It is an arithmetic number, because the mean of its divisors is an integer number (602111991).

Almost surely, 2^1204223981 is an apocalyptic number.

It is an amenable number.

1204223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204223981 is an equidigital number, since it uses as much as digits as its factorization.

1204223981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1204223981 is about 34701.9305082585. The cubic root of 1204223981 is about 1063.9039561888.

The spelling of 1204223981 in words is "one billion, two hundred four million, two hundred twenty-three thousand, nine hundred eighty-one".