202111221999 has 8 divisors (see below), whose sum is σ = 274566188592. Its totient is φ = 132198535040.

The previous prime is 202111221989. The next prime is 202111222031. The reversal of 202111221999 is 999122111202.

It is a happy number.

202111221999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202111221999 - 2²³ = 202102833391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202111221989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635569722 + ... + 635570039.

It is an arithmetic number, because the mean of its divisors is an integer number (34320773574).

Almost surely, 2^202111221999 is an apocalyptic number.

202111221999 is a deficient number, since it is larger than the sum of its proper divisors (72454966593).

202111221999 is a wasteful number, since it uses less digits than its factorization.

202111221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271139817.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 202111221999 in words is "two hundred two billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".