12121112111020 has 48 divisors (see below), whose sum is σ = 28182819184128. Its totient is φ = 4341890900160.

The previous prime is 12121112110999. The next prime is 12121112111041. The reversal of 12121112111020 is 2011121112121.

It is an interprime number because it is at equal distance from previous prime (12121112110999) and next prime (12121112111041).

It is a junction number, because it is equal to n+sod(n) for n = 12121112110985 and 12121112111003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411149172 + ... + 411178651.

It is an arithmetic number, because the mean of its divisors is an integer number (587142066336).

Almost surely, 2^{12121112111020} is an apocalyptic number.

12121112111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121112111020 is an abundant number, since it is smaller than the sum of its proper divisors (16061707073108).

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

12121112111020 is a wasteful number, since it uses less digits than its factorization.

12121112111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822327910 (or 822327908 counting only the distinct ones).

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

Adding to 12121112111020 its reverse (2011121112121), we get a palindrome (14132233223141).

The spelling of 12121112111020 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, one hundred eleven thousand, twenty".