221101212220202 has 16 divisors (see below), whose sum is σ = 335579629429512. Its totient is φ = 109247141821440.

The previous prime is 221101212220193. The next prime is 221101212220241. The reversal of 221101212220202 is 202022212101122.

221101212220202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 74765230662721 + 146335981557481 = 8646689^2 + 12096941^2 .

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, 1451443049 + ... + 1451595372.

Almost surely, 2^{221101212220202} is an apocalyptic number.

221101212220202 is a deficient number, since it is larger than the sum of its proper divisors (114478417209310).

221101212220202 is a wasteful number, since it uses less digits than its factorization.

221101212220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903038873.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221101212220202 its reverse (202022212101122), we get a palindrome (423123424321324).

The spelling of 221101212220202 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred twelve million, two hundred twenty thousand, two hundred two".