221320121202 has 16 divisors (see below), whose sum is σ = 491822491680. Its totient is φ = 73773373716.

The previous prime is 221320121161. The next prime is 221320121233. The reversal of 221320121202 is 202121023122.

221320121202 is a `hidden beast` number, since 2 + 21 + 320 + 121 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 2049260328 + ... + 2049260435.

It is an arithmetic number, because the mean of its divisors is an integer number (30738905730).

Almost surely, 2^221320121202 is an apocalyptic number.

221320121202 is an abundant number, since it is smaller than the sum of its proper divisors (270502370478).

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

221320121202 is a wasteful number, since it uses less digits than its factorization.

221320121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098520774 (or 4098520768 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221320121202 its reverse (202121023122), we get a palindrome (423441144324).

The spelling of 221320121202 in words is "two hundred twenty-one billion, three hundred twenty million, one hundred twenty-one thousand, two hundred two".