221001121111010 has 64 divisors (see below), whose sum is σ = 417343671005184. Its totient is φ = 84165462528000.

The previous prime is 221001121111003. The next prime is 221001121111021. The reversal of 221001121111010 is 10111121100122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14846642 + ... + 25737618.

It is an arithmetic number, because the mean of its divisors is an integer number (6520994859456).

Almost surely, 2^{221001121111010} is an apocalyptic number.

221001121111010 is a deficient number, since it is larger than the sum of its proper divisors (196342549894174).

221001121111010 is a wasteful number, since it uses less digits than its factorization.

221001121111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10892219.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221001121111010 its reverse (10111121100122), we get a palindrome (231112242211132).

The spelling of 221001121111010 in words is "two hundred twenty-one trillion, one billion, one hundred twenty-one million, one hundred eleven thousand, ten".