221201020010 has 32 divisors (see below), whose sum is σ = 398960674560. Its totient is φ = 88303074048.

The previous prime is 221201019997. The next prime is 221201020013. The reversal of 221201020010 is 10020102122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221201019973 and 221201020000.

It is not an unprimeable number, because it can be changed into a prime (221201020013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10438706 + ... + 10459874.

It is an arithmetic number, because the mean of its divisors is an integer number (12467521080).

Almost surely, 2^221201020010 is an apocalyptic number.

221201020010 is a deficient number, since it is larger than the sum of its proper divisors (177759654550).

221201020010 is a wasteful number, since it uses less digits than its factorization.

221201020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23222.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221201020010 its reverse (10020102122), we get a palindrome (231221122132).

The spelling of 221201020010 in words is "two hundred twenty-one billion, two hundred one million, twenty thousand, ten".