101212121121100 has 144 divisors (see below), whose sum is σ = 240082959707136. Its totient is φ = 36729782208000.

The previous prime is 101212121121043. The next prime is 101212121121119. The reversal of 101212121121100 is 1121121212101.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1191150817 + ... + 1191235783.

It is an arithmetic number, because the mean of its divisors is an integer number (1667242775744).

Almost surely, 2^{101212121121100} is an apocalyptic number.

101212121121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101212121121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120041479853568).

101212121121100 is an abundant number, since it is smaller than the sum of its proper divisors (138870838586036).

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

101212121121100 is a wasteful number, since it uses less digits than its factorization.

101212121121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87176 (or 87169 counting only the distinct ones).

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

Adding to 101212121121100 its reverse (1121121212101), we get a palindrome (102333242333201).

The spelling of 101212121121100 in words is "one hundred one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred".