121111200110020 has 24 divisors (see below), whose sum is σ = 256710469022784. Its totient is φ = 47991727893216.

The previous prime is 121111200109973. The next prime is 121111200110023. The reversal of 121111200110020 is 20011002111121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121111200110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28297007232 + ... + 28297011511.

It is an arithmetic number, because the mean of its divisors is an integer number (10696269542616).

Almost surely, 2^{121111200110020} is an apocalyptic number.

121111200110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111200110020 is an abundant number, since it is smaller than the sum of its proper divisors (135599268912764).

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

121111200110020 is a wasteful number, since it uses less digits than its factorization.

121111200110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56594018859 (or 56594018857 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121111200110020 its reverse (20011002111121), we get a palindrome (141122202221141).

The spelling of 121111200110020 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred million, one hundred ten thousand, twenty".