121201120200100 has 144 divisors (see below), whose sum is σ = 268997720544000. Its totient is φ = 47379156249600.

The previous prime is 121201120200091. The next prime is 121201120200119. The reversal of 121201120200100 is 1002021102121.

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, 9729553072 + ... + 9729565528.

It is an arithmetic number, because the mean of its divisors is an integer number (1868039726000).

Almost surely, 2^{121201120200100} is an apocalyptic number.

121201120200100 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 121201120200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134498860272000).

121201120200100 is an abundant number, since it is smaller than the sum of its proper divisors (147796600343900).

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

121201120200100 is a wasteful number, since it uses less digits than its factorization.

121201120200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15398 (or 15391 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121201120200100 its reverse (1002021102121), we get a palindrome (122203141302221).

The spelling of 121201120200100 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty million, two hundred thousand, one hundred".