1021221223199 has 2 divisors, whose sum is σ = 1021221223200. Its totient is φ = 1021221223198.

The previous prime is 1021221223177. The next prime is 1021221223213. The reversal of 1021221223199 is 9913221221201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021221223199 - 2¹² = 1021221219103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021221223129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610611599 + 510610611600.

It is an arithmetic number, because the mean of its divisors is an integer number (510610611600).

Almost surely, 2^{1021221223199} is an apocalyptic number.

1021221223199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021221223199 is an equidigital number, since it uses as much as digits as its factorization.

1021221223199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 1021221223199 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty-three thousand, one hundred ninety-nine".