221221001202 has 32 divisors (see below), whose sum is σ = 454180174080. Its totient is φ = 71809545600.

The previous prime is 221221001147. The next prime is 221221001213. The reversal of 221221001202 is 202100122122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3162049 + ... + 3231252.

It is an arithmetic number, because the mean of its divisors is an integer number (14193130440).

Almost surely, 2^221221001202 is an apocalyptic number.

221221001202 is an abundant number, since it is smaller than the sum of its proper divisors (232959172878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221221001202 is a wasteful number, since it uses less digits than its factorization.

221221001202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393458.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221221001202 its reverse (202100122122), we get a palindrome (423321123324).

The spelling of 221221001202 in words is "two hundred twenty-one billion, two hundred twenty-one million, one thousand, two hundred two".