221200021222010 has 64 divisors (see below), whose sum is σ = 412067753798400. Its totient is φ = 85392051558912.

The previous prime is 221200021221997. The next prime is 221200021222013. The reversal of 221200021222010 is 10222120002122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221200021222010.

It is not an unprimeable number, because it can be changed into a prime (221200021222013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8035149926 + ... + 8035177454.

It is an arithmetic number, because the mean of its divisors is an integer number (6438558653100).

Almost surely, 2^{221200021222010} is an apocalyptic number.

221200021222010 is a deficient number, since it is larger than the sum of its proper divisors (190867732576390).

221200021222010 is a wasteful number, since it uses less digits than its factorization.

221200021222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38535.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221200021222010 its reverse (10222120002122), we get a palindrome (231422141224132).

The spelling of 221200021222010 in words is "two hundred twenty-one trillion, two hundred billion, twenty-one million, two hundred twenty-two thousand, ten".