100021100122020 has 192 divisors, whose sum is σ = 355752579280896. Its totient is φ = 20391461675520.

The previous prime is 100021100121941. The next prime is 100021100122121. The reversal of 100021100122020 is 20221001120001.

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 = 100021100121987 and 100021100122005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 203996544 + ... + 204486263.

It is an arithmetic number, because the mean of its divisors is an integer number (1852878017088).

Almost surely, 2^{100021100122020} is an apocalyptic number.

100021100122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021100122020 is an abundant number, since it is smaller than the sum of its proper divisors (255731479158876).

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

100021100122020 is a wasteful number, since it uses less digits than its factorization.

100021100122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408482890 (or 408482888 counting only the distinct ones).

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

Adding to 100021100122020 its reverse (20221001120001), we get a palindrome (120242101242021).

The spelling of 100021100122020 in words is "one hundred trillion, twenty-one billion, one hundred million, one hundred twenty-two thousand, twenty".