120211121221 has 16 divisors (see below), whose sum is σ = 122173099776. Its totient is φ = 118265400000.

The previous prime is 120211121209. The next prime is 120211121237. The reversal of 120211121221 is 122121112021.

It is not a de Polignac number, because 120211121221 - 2²⁷ = 120076903493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120211121195 and 120211121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211122221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33105076 + ... + 33108706.

It is an arithmetic number, because the mean of its divisors is an integer number (7635818736).

Almost surely, 2^120211121221 is an apocalyptic number.

It is an amenable number.

120211121221 is a deficient number, since it is larger than the sum of its proper divisors (1961978555).

120211121221 is a wasteful number, since it uses less digits than its factorization.

120211121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 120211121221 its reverse (122121112021), we get a palindrome (242332233242).

The spelling of 120211121221 in words is "one hundred twenty billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".