221020022122112 has 32 divisors (see below), whose sum is σ = 440328551077380. Its totient is φ = 110506189694976.

The previous prime is 221020022122103. The next prime is 221020022122169. The reversal of 221020022122112 is 211221220020122.

It can be written as a sum of positive squares in 2 ways, for example, as 220974884570176 + 45137551936 = 14865224^2 + 212456^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26136533 + ... + 33543380.

Almost surely, 2^{221020022122112} is an apocalyptic number.

It is an amenable number.

221020022122112 is a deficient number, since it is larger than the sum of its proper divisors (219308528955268).

221020022122112 is an equidigital number, since it uses as much as digits as its factorization.

221020022122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59708860 (or 59708848 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221020022122112 its reverse (211221220020122), we get a palindrome (432241242142234).

The spelling of 221020022122112 in words is "two hundred twenty-one trillion, twenty billion, twenty-two million, one hundred twenty-two thousand, one hundred twelve".