21111200110122 has 8 divisors (see below), whose sum is σ = 42222400220256. Its totient is φ = 7037066703372.

The previous prime is 21111200110109. The next prime is 21111200110141. The reversal of 21111200110122 is 22101100211112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21111200110122 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759266675838 + ... + 1759266675849.

It is an arithmetic number, because the mean of its divisors is an integer number (5277800027532).

Almost surely, 2^{21111200110122} is an apocalyptic number.

21111200110122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21111200110122 is a wasteful number, since it uses less digits than its factorization.

21111200110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518533351692.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21111200110122 its reverse (22101100211112), we get a palindrome (43212300321234).

The spelling of 21111200110122 in words is "twenty-one trillion, one hundred eleven billion, two hundred million, one hundred ten thousand, one hundred twenty-two".