221321032232210 has 16 divisors (see below), whose sum is σ = 399581416507392. Its totient is φ = 88260955450800.

The previous prime is 221321032232197. The next prime is 221321032232233. The reversal of 221321032232210 is 12232230123122.

It is a super-2 number, since 2×221321032232210² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221321032232210.

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, 33432176786 + ... + 33432183405.

It is an arithmetic number, because the mean of its divisors is an integer number (24973838531712).

Almost surely, 2^{221321032232210} is an apocalyptic number.

221321032232210 is a deficient number, since it is larger than the sum of its proper divisors (178260384275182).

221321032232210 is a wasteful number, since it uses less digits than its factorization.

221321032232210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66864360529.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 221321032232210 its reverse (12232230123122), we get a palindrome (233553262355332).

The spelling of 221321032232210 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, thirty-two million, two hundred thirty-two thousand, two hundred ten".