120000211221 has 32 divisors (see below), whose sum is σ = 176487949440. Its totient is φ = 71920742400.

The previous prime is 120000211211. The next prime is 120000211223. The reversal of 120000211221 is 122112000021.

It is a de Polignac number, because none of the positive numbers 2^k-120000211221 is a prime.

It is a super-2 number, since 2×120000211221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120000211197 and 120000211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000211223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1842021 + ... + 1906053.

It is an arithmetic number, because the mean of its divisors is an integer number (5515248420).

Almost surely, 2^120000211221 is an apocalyptic number.

120000211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120000211221 is a deficient number, since it is larger than the sum of its proper divisors (56487738219).

120000211221 is a wasteful number, since it uses less digits than its factorization.

120000211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64677.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120000211221 its reverse (122112000021), we get a palindrome (242112211242).

It can be divided in two parts, 12000021 and 1221, that multiplied together give a palindrome (14652025641).

The spelling of 120000211221 in words is "one hundred twenty billion, two hundred eleven thousand, two hundred twenty-one".