100121122100220 has 48 divisors (see below), whose sum is σ = 301903691258400. Its totient is φ = 24645199286016.

The previous prime is 100121122100189. The next prime is 100121122100227. The reversal of 100121122100220 is 22001221121001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100121122100220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121122100227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64180205695 + ... + 64180207254.

It is an arithmetic number, because the mean of its divisors is an integer number (6289660234550).

Almost surely, 2^{100121122100220} is an apocalyptic number.

100121122100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121122100220 is an abundant number, since it is smaller than the sum of its proper divisors (201782569158180).

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

100121122100220 is a wasteful number, since it uses less digits than its factorization.

100121122100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128360412974 (or 128360412972 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100121122100220 its reverse (22001221121001), we get a palindrome (122122343221221).

The spelling of 100121122100220 in words is "one hundred trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, two hundred twenty".