12111021221012 has 72 divisors (see below), whose sum is σ = 26148263904000. Its totient is φ = 4883376738240.

The previous prime is 12111021221009. The next prime is 12111021221053. The reversal of 12111021221012 is 21012212011121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21746012 + ... + 22295987.

It is an arithmetic number, because the mean of its divisors is an integer number (363170332000).

Almost surely, 2^{12111021221012} is an apocalyptic number.

It is an amenable number.

12111021221012 is an abundant number, since it is smaller than the sum of its proper divisors (14037242682988).

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

12111021221012 is a wasteful number, since it uses less digits than its factorization.

12111021221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44042101 (or 44042092 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111021221012 its reverse (21012212011121), we get a palindrome (33123233232133).

The spelling of 12111021221012 in words is "twelve trillion, one hundred eleven billion, twenty-one million, two hundred twenty-one thousand, twelve".