100100221012020 has 24 divisors (see below), whose sum is σ = 280280618833824. Its totient is φ = 26693392269856.

The previous prime is 100100221012007. The next prime is 100100221012027. The reversal of 100100221012020 is 20210122001001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100100221011987 and 100100221012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100100221012027) 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, 834168508374 + ... + 834168508493.

It is an arithmetic number, because the mean of its divisors is an integer number (11678359118076).

Almost surely, 2^{100100221012020} is an apocalyptic number.

100100221012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100100221012020 is an abundant number, since it is smaller than the sum of its proper divisors (180180397821804).

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

100100221012020 is a wasteful number, since it uses less digits than its factorization.

100100221012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668337016879 (or 1668337016877 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100100221012020 its reverse (20210122001001), we get a palindrome (120310343013021).

The spelling of 100100221012020 in words is "one hundred trillion, one hundred billion, two hundred twenty-one million, twelve thousand, twenty".