1020231220199 has 4 divisors (see below), whose sum is σ = 1020759018936. Its totient is φ = 1019703421464.

The previous prime is 1020231220121. The next prime is 1020231220223. The reversal of 1020231220199 is 9910221320201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020231220199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020231420199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263896469 + ... + 263900334.

It is an arithmetic number, because the mean of its divisors is an integer number (255189754734).

Almost surely, 2^{1020231220199} is an apocalyptic number.

1020231220199 is a deficient number, since it is larger than the sum of its proper divisors (527798737).

1020231220199 is an equidigital number, since it uses as much as digits as its factorization.

1020231220199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527798736.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 1020231220199 in words is "one trillion, twenty billion, two hundred thirty-one million, two hundred twenty thousand, one hundred ninety-nine".