122220221100020 has 48 divisors (see below), whose sum is σ = 266629426871808. Its totient is φ = 47009709002880.

The previous prime is 122220221100007. The next prime is 122220221100049. The reversal of 122220221100020 is 20001122022221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627703262 + ... + 627897941.

It is an arithmetic number, because the mean of its divisors is an integer number (5554779726496).

Almost surely, 2^{122220221100020} is an apocalyptic number.

122220221100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122220221100020 is an abundant number, since it is smaller than the sum of its proper divisors (144409205771788).

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

122220221100020 is a wasteful number, since it uses less digits than its factorization.

122220221100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255601400 (or 1255601398 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122220221100020 its reverse (20001122022221), we get a palindrome (142221343122241).

The spelling of 122220221100020 in words is "one hundred twenty-two trillion, two hundred twenty billion, two hundred twenty-one million, one hundred thousand, twenty".