120021210 has 32 divisors (see below), whose sum is σ = 320057280. Its totient is φ = 32005584.

The previous prime is 120021197. The next prime is 120021211. The reversal of 120021210 is 12120021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120021192 and 120021201.

It is not an unprimeable number, because it can be changed into a prime (120021211) 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, 221992 + ... + 222531.

It is an arithmetic number, because the mean of its divisors is an integer number (10001790).

Almost surely, 2^120021210 is an apocalyptic number.

120021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120021210 is an abundant number, since it is smaller than the sum of its proper divisors (200036070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120021210 is a wasteful number, since it uses less digits than its factorization.

120021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444539 (or 444533 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 120021210 is about 10955.4192069496. The cubic root of 120021210 is about 493.2714733531.

Adding to 120021210 its reverse (12120021), we get a palindrome (132141231).

The spelling of 120021210 in words is "one hundred twenty million, twenty-one thousand, two hundred ten".