100120001221020 has 72 divisors (see below), whose sum is σ = 308137921135632. Its totient is φ = 24271515445760.

The previous prime is 100120001220991. The next prime is 100120001221057. The reversal of 100120001221020 is 20122100021001.

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 = 100120001220987 and 100120001221005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6895309629 + ... + 6895324148.

It is an arithmetic number, because the mean of its divisors is an integer number (4279693349106).

Almost surely, 2^{100120001221020} is an apocalyptic number.

100120001221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100120001221020 is an abundant number, since it is smaller than the sum of its proper divisors (208017919914612).

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

100120001221020 is a wasteful number, since it uses less digits than its factorization.

100120001221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13790633811 (or 13790633798 counting only the distinct ones).

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

Adding to 100120001221020 its reverse (20122100021001), we get a palindrome (120242101242021).

The spelling of 100120001221020 in words is "one hundred trillion, one hundred twenty billion, one million, two hundred twenty-one thousand, twenty".