202111221998 has 16 divisors (see below), whose sum is σ = 346482176640. Its totient is φ = 86617646136.

The previous prime is 202111221989. The next prime is 202111222031. The reversal of 202111221998 is 899122111202.

It is a super-2 number, since 2×202111221998² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455965 + ... + 1588727.

It is an arithmetic number, because the mean of its divisors is an integer number (21655136040).

Almost surely, 2^202111221998 is an apocalyptic number.

202111221998 is a deficient number, since it is larger than the sum of its proper divisors (144370954642).

202111221998 is a wasteful number, since it uses less digits than its factorization.

202111221998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241511.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 202111221998 in words is "two hundred two billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-eight".