221101221121202 has 4 divisors (see below), whose sum is σ = 331651831681806. Its totient is φ = 110550610560600.

The previous prime is 221101221121199. The next prime is 221101221121223. The reversal of 221101221121202 is 202121122101122.

221101221121202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 215565557986801 + 5535663134401 = 14682151^2 + 2352799^2 .

It is a super-2 number, since 2×221101221121202² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55275305280299 + ... + 55275305280302.

Almost surely, 2^{221101221121202} is an apocalyptic number.

221101221121202 is a deficient number, since it is larger than the sum of its proper divisors (110550610560604).

221101221121202 is a wasteful number, since it uses less digits than its factorization.

221101221121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110550610560603.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221101221121202 its reverse (202121122101122), we get a palindrome (423222343222324).

The spelling of 221101221121202 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred two".