1220021199999 has 24 divisors (see below), whose sum is σ = 2014074840960. Its totient is φ = 697130190288.

The previous prime is 1220021199973. The next prime is 1220021200009. The reversal of 1220021199999 is 9999911200221.

It is not a de Polignac number, because 1220021199999 - 2⁵ = 1220021199967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021199799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1521892 + ... + 2180870.

It is an arithmetic number, because the mean of its divisors is an integer number (83919785040).

Almost surely, 2^{1220021199999} is an apocalyptic number.

1220021199999 is a deficient number, since it is larger than the sum of its proper divisors (794053640961).

1220021199999 is a wasteful number, since it uses less digits than its factorization.

1220021199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688379 (or 688376 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

The spelling of 1220021199999 in words is "one trillion, two hundred twenty billion, twenty-one million, one hundred ninety-nine thousand, nine hundred ninety-nine".