221101020412 has 24 divisors (see below), whose sum is σ = 410368547232. Its totient is φ = 104010456000.

The previous prime is 221101020401. The next prime is 221101020433. The reversal of 221101020412 is 214020101122.

It is a super-2 number, since 2×221101020412² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19693339 + ... + 19704562.

It is an arithmetic number, because the mean of its divisors is an integer number (17098689468).

Almost surely, 2^221101020412 is an apocalyptic number.

It is an amenable number.

221101020412 is a deficient number, since it is larger than the sum of its proper divisors (189267526820).

221101020412 is a wasteful number, since it uses less digits than its factorization.

221101020412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39397989 (or 39397987 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221101020412 its reverse (214020101122), we get a palindrome (435121121534).

The spelling of 221101020412 in words is "two hundred twenty-one billion, one hundred one million, twenty thousand, four hundred twelve".