1021220000399 has 2 divisors, whose sum is σ = 1021220000400. Its totient is φ = 1021220000398.

The previous prime is 1021220000321. The next prime is 1021220000497. The reversal of 1021220000399 is 9930000221201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021220000399 - 2¹⁶ = 1021219934863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021220000309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610000199 + 510610000200.

It is an arithmetic number, because the mean of its divisors is an integer number (510610000200).

Almost surely, 2^{1021220000399} is an apocalyptic number.

1021220000399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021220000399 is an equidigital number, since it uses as much as digits as its factorization.

1021220000399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 1021220000399 in words is "one trillion, twenty-one billion, two hundred twenty million, three hundred ninety-nine", and thus it is an aban number.