221211101010010 has 32 divisors (see below), whose sum is σ = 404125116656832. Its totient is φ = 87163313381760.

The previous prime is 221211101009999. The next prime is 221211101010013. The reversal of 221211101010010 is 10010101112122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221211101010013) 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, 142637550 + ... + 144180070.

It is an arithmetic number, because the mean of its divisors is an integer number (12628909895526).

Almost surely, 2^{221211101010010} is an apocalyptic number.

221211101010010 is a deficient number, since it is larger than the sum of its proper divisors (182914015646822).

221211101010010 is a wasteful number, since it uses less digits than its factorization.

221211101010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756638.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221211101010010 its reverse (10010101112122), we get a palindrome (231221202122132).

The spelling of 221211101010010 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred one million, ten thousand, ten".