221201121221202 has 64 divisors (see below), whose sum is σ = 448496682480000. Its totient is φ = 72722345422848.

The previous prime is 221201121221177. The next prime is 221201121221233. The reversal of 221201121221202 is 202122121102122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359879674 + ... + 360493802.

It is an arithmetic number, because the mean of its divisors is an integer number (7007760663750).

Almost surely, 2^{221201121221202} is an apocalyptic number.

221201121221202 is an abundant number, since it is smaller than the sum of its proper divisors (227295561258798).

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

221201121221202 is a wasteful number, since it uses less digits than its factorization.

221201121221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615915.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221201121221202 its reverse (202122121102122), we get a palindrome (423323242323324).

The spelling of 221201121221202 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred two".