100121100021100 has 72 divisors (see below), whose sum is σ = 217638614317040. Its totient is φ = 39979192135680.

The previous prime is 100121100021091. The next prime is 100121100021101. The reversal of 100121100021100 is 1120001121001.

It is a super-2 number, since 2×100121100021100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (100121100021101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279317791 + ... + 279676009.

Almost surely, 2^{100121100021100} is an apocalyptic number.

100121100021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121100021100 is an abundant number, since it is smaller than the sum of its proper divisors (117517514295940).

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

100121100021100 is a wasteful number, since it uses less digits than its factorization.

100121100021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363059 (or 363052 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 100121100021100 its reverse (1120001121001), we get a palindrome (101241101142101).

The spelling of 100121100021100 in words is "one hundred trillion, one hundred twenty-one billion, one hundred million, twenty-one thousand, one hundred".