1990221220211 has 32 divisors (see below), whose sum is σ = 2427408253440. Its totient is φ = 1592890707456.

The previous prime is 1990221220201. The next prime is 1990221220243. The reversal of 1990221220211 is 1120221220991.

It is a cyclic number.

It is not a de Polignac number, because 1990221220211 - 2³⁰ = 1989147478387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990221220201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7583000 + ... + 7841066.

It is an arithmetic number, because the mean of its divisors is an integer number (75856507920).

Almost surely, 2^{1990221220211} is an apocalyptic number.

1990221220211 is a deficient number, since it is larger than the sum of its proper divisors (437187033229).

1990221220211 is a wasteful number, since it uses less digits than its factorization.

1990221220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258603.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 1990221220211 in words is "one trillion, nine hundred ninety billion, two hundred twenty-one million, two hundred twenty thousand, two hundred eleven".