221012011101 has 16 divisors (see below), whose sum is σ = 337342464000. Its totient is φ = 126081731568.

The previous prime is 221012011097. The next prime is 221012011123. The reversal of 221012011101 is 101110210122.

It is not a de Polignac number, because 221012011101 - 2² = 221012011097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012011501) 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, 8772381 + ... + 8797538.

It is an arithmetic number, because the mean of its divisors is an integer number (21083904000).

Almost surely, 2^221012011101 is an apocalyptic number.

221012011101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221012011101 is a deficient number, since it is larger than the sum of its proper divisors (116330452899).

221012011101 is a wasteful number, since it uses less digits than its factorization.

221012011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17570528.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221012011101 its reverse (101110210122), we get a palindrome (322122221223).

The spelling of 221012011101 in words is "two hundred twenty-one billion, twelve million, eleven thousand, one hundred one".