120021122221 has 96 divisors (see below), whose sum is σ = 172440624384. Its totient is φ = 81004492800.

The previous prime is 120021122197. The next prime is 120021122237. The reversal of 120021122221 is 122221120021.

It is a happy number.

It is not a de Polignac number, because 120021122221 - 2⁹ = 120021121709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021122195 and 120021122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021122261) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 78804966 + ... + 78806488.

It is an arithmetic number, because the mean of its divisors is an integer number (1796256504).

Almost surely, 2^120021122221 is an apocalyptic number.

120021122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120021122221 is a deficient number, since it is larger than the sum of its proper divisors (52419502163).

120021122221 is a wasteful number, since it uses less digits than its factorization.

120021122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003 (or 1992 counting only the distinct ones).

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

Adding to 120021122221 its reverse (122221120021), we get a palindrome (242242242242).

It can be divided in two parts, 120021 and 122221, that added together give a palindrome (242242).

The spelling of 120021122221 in words is "one hundred twenty billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".