100101221222020 has 24 divisors (see below), whose sum is σ = 210213416544768. Its totient is φ = 40040326207200.

The previous prime is 100101221221999. The next prime is 100101221222021. The reversal of 100101221222020 is 20222122101001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100101221221985 and 100101221222003.

It is not an unprimeable number, because it can be changed into a prime (100101221222021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5021476 + ... + 15013915.

It is an arithmetic number, because the mean of its divisors is an integer number (8758892356032).

Almost surely, 2^{100101221222020} is an apocalyptic number.

100101221222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100101221222020 is an abundant number, since it is smaller than the sum of its proper divisors (110112195322748).

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

100101221222020 is a wasteful number, since it uses less digits than its factorization.

100101221222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20285211 (or 20285209 counting only the distinct ones).

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

Adding to 100101221222020 its reverse (20222122101001), we get a palindrome (120323343323021).

The spelling of 100101221222020 in words is "one hundred trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty".