221120112212021 has 12 divisors (see below), whose sum is σ = 243053687368800. Its totient is φ = 201014720962440.

The previous prime is 221120112211987. The next prime is 221120112212053. The reversal of 221120112212021 is 120212211021122.

It is not a de Polignac number, because 221120112212021 - 2¹⁴ = 221120112195637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221120112211984 and 221120112212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120112218021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9327791 + ... + 23005388.

It is an arithmetic number, because the mean of its divisors is an integer number (20254473947400).

Almost surely, 2^{221120112212021} is an apocalyptic number.

It is an amenable number.

221120112212021 is a deficient number, since it is larger than the sum of its proper divisors (21933575156779).

221120112212021 is a wasteful number, since it uses less digits than its factorization.

221120112212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32389720 (or 32389709 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221120112212021 its reverse (120212211021122), we get a palindrome (341332323233143).

The spelling of 221120112212021 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred twelve million, two hundred twelve thousand, twenty-one".