120211222221 has 12 divisors (see below), whose sum is σ = 175357625820. Its totient is φ = 79347340800.

The previous prime is 120211222169. The next prime is 120211222277. The reversal of 120211222221 is 122222112021.

It is a happy number.

120211222221 is a `hidden beast` number, since 12 + 0 + 211 + 222 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 109570268196 + 10640954025 = 331014^2 + 103155^2 .

It is not a de Polignac number, because 120211222221 - 2¹⁵ = 120211189453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120211222194 and 120211222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211212221) 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, 66121876 + ... + 66123693.

It is an arithmetic number, because the mean of its divisors is an integer number (14613135485).

Almost surely, 2^120211222221 is an apocalyptic number.

It is an amenable number.

120211222221 is a deficient number, since it is larger than the sum of its proper divisors (55146403599).

120211222221 is a wasteful number, since it uses less digits than its factorization.

120211222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132245676 (or 132245673 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 120211222221 its reverse (122222112021), we get a palindrome (242433334242).

The spelling of 120211222221 in words is "one hundred twenty billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".