122121220210 has 64 divisors (see below), whose sum is σ = 254469288960. Its totient is φ = 41756946880.

The previous prime is 122121220201. The next prime is 122121220267. The reversal of 122121220210 is 12022121221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259792 + ... + 558331.

It is an arithmetic number, because the mean of its divisors is an integer number (3976082640).

Almost surely, 2^122121220210 is an apocalyptic number.

122121220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122121220210 is an abundant number, since it is smaller than the sum of its proper divisors (132348068750).

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

122121220210 is a wasteful number, since it uses less digits than its factorization.

122121220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818223.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122121220210 its reverse (12022121221), we get a palindrome (134143341431).

The spelling of 122121220210 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred ten".