122220210100 has 36 divisors (see below), whose sum is σ = 270221978124. Its totient is φ = 47965665280.

The previous prime is 122220210097. The next prime is 122220210109. The reversal of 122220210100 is 1012022221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13866004516 + 108354205584 = 117754^2 + 329172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122220210109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11524909 + ... + 11535508.

It is an arithmetic number, because the mean of its divisors is an integer number (7506166059).

Almost surely, 2^122220210100 is an apocalyptic number.

122220210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122220210100 is an abundant number, since it is smaller than the sum of its proper divisors (148001768024).

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

122220210100 is a wasteful number, since it uses less digits than its factorization.

122220210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23060484 (or 23060477 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 122220210100 its reverse (1012022221), we get a palindrome (123232232321).

The spelling of 122220210100 in words is "one hundred twenty-two billion, two hundred twenty million, two hundred ten thousand, one hundred".