120021211221 has 8 divisors (see below), whose sum is σ = 160030876320. Its totient is φ = 80012843472.

The previous prime is 120021211217. The next prime is 120021211229. The reversal of 120021211221 is 122112120021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120021211221 - 2² = 120021211217 is a prime.

It is a super-2 number, since 2×120021211221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120021211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021211229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82770 + ... + 496883.

It is an arithmetic number, because the mean of its divisors is an integer number (20003859540).

Almost surely, 2^120021211221 is an apocalyptic number.

It is an amenable number.

120021211221 is a deficient number, since it is larger than the sum of its proper divisors (40009665099).

120021211221 is an equidigital number, since it uses as much as digits as its factorization.

120021211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648675.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120021211221 its reverse (122112120021), we get a palindrome (242133331242).

The spelling of 120021211221 in words is "one hundred twenty billion, twenty-one million, two hundred eleven thousand, two hundred twenty-one".