221110101011 has 4 divisors (see below), whose sum is σ = 221114068032. Its totient is φ = 221106133992.

The previous prime is 221110101007. The next prime is 221110101031. The reversal of 221110101011 is 110101011122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221110101011 - 2² = 221110101007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221110100983 and 221110101001.

It is not an unprimeable number, because it can be changed into a prime (221110101031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898696 + ... + 2011781.

It is an arithmetic number, because the mean of its divisors is an integer number (55278517008).

Almost surely, 2^221110101011 is an apocalyptic number.

221110101011 is a deficient number, since it is larger than the sum of its proper divisors (3967021).

221110101011 is an equidigital number, since it uses as much as digits as its factorization.

221110101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967020.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 221110101011 its reverse (110101011122), we get a palindrome (331211112133).

The spelling of 221110101011 in words is "two hundred twenty-one billion, one hundred ten million, one hundred one thousand, eleven".