1493988495221 has 2 divisors, whose sum is σ = 1493988495222. Its totient is φ = 1493988495220.

The previous prime is 1493988495073. The next prime is 1493988495257. The reversal of 1493988495221 is 1225948893941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1437577020100 + 56411475121 = 1198990^2 + 237511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493988495221 - 2²² = 1493984300917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493988498221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746994247610 + 746994247611.

It is an arithmetic number, because the mean of its divisors is an integer number (746994247611).

Almost surely, 2^{1493988495221} is an apocalyptic number.

It is an amenable number.

1493988495221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493988495221 is an equidigital number, since it uses as much as digits as its factorization.

1493988495221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 65.

The spelling of 1493988495221 in words is "one trillion, four hundred ninety-three billion, nine hundred eighty-eight million, four hundred ninety-five thousand, two hundred twenty-one".