221111212211120 has 80 divisors (see below), whose sum is σ = 640935358011648. Its totient is φ = 68917780427520.

The previous prime is 221111212211089. The next prime is 221111212211143. The reversal of 221111212211120 is 21112212111122.

It is a happy number.

221111212211120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221111212211092 and 221111212211101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17947332494 + ... + 17947344813.

Almost surely, 2^{221111212211120} is an apocalyptic number.

221111212211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111212211120 is an abundant number, since it is smaller than the sum of its proper divisors (419824145800528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111212211120 is a wasteful number, since it uses less digits than its factorization.

221111212211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35894677338 (or 35894677332 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 221111212211120 its reverse (21112212111122), we get a palindrome (242223424322242).

The spelling of 221111212211120 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty".