21111343015112 has 32 divisors (see below), whose sum is σ = 45704969425920. Its totient is φ = 8954442984960.

The previous prime is 21111343015067. The next prime is 21111343015129. The reversal of 21111343015112 is 21151034311112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943233064 + ... + 1943243927.

It is an arithmetic number, because the mean of its divisors is an integer number (1428280294560).

Almost surely, 2^{21111343015112} is an apocalyptic number.

It is an amenable number.

21111343015112 is an abundant number, since it is smaller than the sum of its proper divisors (24593626410808).

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

21111343015112 is a wasteful number, since it uses less digits than its factorization.

21111343015112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886477101 (or 3886477097 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 21111343015112 its reverse (21151034311112), we get a palindrome (42262377326224).

The spelling of 21111343015112 in words is "twenty-one trillion, one hundred eleven billion, three hundred forty-three million, fifteen thousand, one hundred twelve".