120011122223221 has 4 divisors (see below), whose sum is σ = 120012880412844. Its totient is φ = 120009364033600.

The previous prime is 120011122223197. The next prime is 120011122223243. The reversal of 120011122223221 is 122322221110021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23922017948196 + 96089104275025 = 4891014^2 + 9802505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120011122223221 is a prime.

It is a super-2 number, since 2×120011122223221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120011122223192 and 120011122223201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120011122223281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878992420 + ... + 879128941.

It is an arithmetic number, because the mean of its divisors is an integer number (30003220103211).

Almost surely, 2^{120011122223221} is an apocalyptic number.

It is an amenable number.

120011122223221 is a deficient number, since it is larger than the sum of its proper divisors (1758189623).

120011122223221 is an equidigital number, since it uses as much as digits as its factorization.

120011122223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758189622.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 120011122223221 its reverse (122322221110021), we get a palindrome (242333343333242).

The spelling of 120011122223221 in words is "one hundred twenty trillion, eleven billion, one hundred twenty-two million, two hundred twenty-three thousand, two hundred twenty-one".