122220021210 has 64 divisors (see below), whose sum is σ = 346791801600. Its totient is φ = 26972692992.

The previous prime is 122220021071. The next prime is 122220021211. The reversal of 122220021210 is 12120022221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 122220021210.

It is not an unprimeable number, because it can be changed into a prime (122220021211) 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, 10028395 + ... + 10040574.

It is an arithmetic number, because the mean of its divisors is an integer number (5418621900).

Almost surely, 2^122220021210 is an apocalyptic number.

122220021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122220021210 is an abundant number, since it is smaller than the sum of its proper divisors (224571780390).

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

122220021210 is a wasteful number, since it uses less digits than its factorization.

122220021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20069015.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 122220021210 its reverse (12120022221), we get a palindrome (134340043431).

The spelling of 122220021210 in words is "one hundred twenty-two billion, two hundred twenty million, twenty-one thousand, two hundred ten".