120011211221 has 16 divisors (see below), whose sum is σ = 139849348608. Its totient is φ = 101774668800.

The previous prime is 120011211211. The next prime is 120011211247. The reversal of 120011211221 is 122112110021.

It is a cyclic number.

It is not a de Polignac number, because 120011211221 - 2²² = 120007016917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120011211196 and 120011211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120011211211) 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, 2818565 + ... + 2860826.

It is an arithmetic number, because the mean of its divisors is an integer number (8740584288).

Almost surely, 2^120011211221 is an apocalyptic number.

120011211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120011211221 is a deficient number, since it is larger than the sum of its proper divisors (19838137387).

120011211221 is a wasteful number, since it uses less digits than its factorization.

120011211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5679532.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 120011211221 its reverse (122112110021), we get a palindrome (242123321242).

The spelling of 120011211221 in words is "one hundred twenty billion, eleven million, two hundred eleven thousand, two hundred twenty-one".