100111212121100 has 36 divisors (see below), whose sum is σ = 217256532546144. Its totient is φ = 40041682591680.

The previous prime is 100111212121093. The next prime is 100111212121127. The reversal of 100111212121100 is 1121212111001.

It is a super-2 number, since 2×100111212121100² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33591764 + ... + 36450363.

Almost surely, 2^{100111212121100} is an apocalyptic number.

100111212121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111212121100 is an abundant number, since it is smaller than the sum of its proper divisors (117145320425044).

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

100111212121100 is a wasteful number, since it uses less digits than its factorization.

100111212121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70056434 (or 70056427 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 100111212121100 its reverse (1121212111001), we get a palindrome (101232424232101).

The spelling of 100111212121100 in words is "one hundred trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred".