100020021121020 has 192 divisors, whose sum is σ = 376019324384256. Its totient is φ = 19184659384320.

The previous prime is 100020021121003. The next prime is 100020021121057. The reversal of 100020021121020 is 20121120020001.

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 = 100020021120987 and 100020021121005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 832607449 + ... + 832727568.

It is an arithmetic number, because the mean of its divisors is an integer number (1958433981168).

Almost surely, 2^{100020021121020} is an apocalyptic number.

100020021121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020021121020 is an abundant number, since it is smaller than the sum of its proper divisors (275999303263236).

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

100020021121020 is a wasteful number, since it uses less digits than its factorization.

100020021121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665335060 (or 1665335058 counting only the distinct ones).

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

Adding to 100020021121020 its reverse (20121120020001), we get a palindrome (120141141141021).

The spelling of 100020021121020 in words is "one hundred trillion, twenty billion, twenty-one million, one hundred twenty-one thousand, twenty".