221121011101012 has 96 divisors (see below), whose sum is σ = 427957378007040. Its totient is φ = 99130324634880.

The previous prime is 221121011101009. The next prime is 221121011101043. The reversal of 221121011101012 is 210101110121122.

It is a congruent number.

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, 5481005313 + ... + 5481045655.

It is an arithmetic number, because the mean of its divisors is an integer number (4457889354240).

Almost surely, 2^{221121011101012} is an apocalyptic number.

221121011101012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221121011101012 is a deficient number, since it is larger than the sum of its proper divisors (206836366906028).

221121011101012 is a wasteful number, since it uses less digits than its factorization.

221121011101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43933 (or 43931 counting only the distinct ones).

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

Adding to 221121011101012 its reverse (210101110121122), we get a palindrome (431222121222134).

The spelling of 221121011101012 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, eleven million, one hundred one thousand, twelve".