121200101020100 has 18 divisors (see below), whose sum is σ = 263004219213834. Its totient is φ = 48480040408000.

The previous prime is 121200101020007. The next prime is 121200101020217. The reversal of 121200101020100 is 1020101002121.

It can be written as a sum of positive squares in 3 ways, for example, as 35969398336 + 121164131621764 = 189656^2 + 11007458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 606000505001 + ... + 606000505200.

Almost surely, 2^{121200101020100} is an apocalyptic number.

121200101020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200101020100 is an abundant number, since it is smaller than the sum of its proper divisors (141804118193734).

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

121200101020100 is a wasteful number, since it uses less digits than its factorization.

121200101020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212001010215 (or 1212001010208 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121200101020100 its reverse (1020101002121), we get a palindrome (122220202022221).

The spelling of 121200101020100 in words is "one hundred twenty-one trillion, two hundred billion, one hundred one million, twenty thousand, one hundred".