21110121130 has 16 divisors (see below), whose sum is σ = 43426535040. Its totient is φ = 7237755792.

The previous prime is 21110121101. The next prime is 21110121139. The reversal of 21110121130 is 3112101112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21110121130.

It is not an unprimeable number, because it can be changed into a prime (21110121139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150786510 + ... + 150786649.

It is an arithmetic number, because the mean of its divisors is an integer number (2714158440).

Almost surely, 2^21110121130 is an apocalyptic number.

21110121130 is an abundant number, since it is smaller than the sum of its proper divisors (22316413910).

21110121130 is a wasteful number, since it uses less digits than its factorization.

21110121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301573173.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21110121130 its reverse (3112101112), we get a palindrome (24222222242).

The spelling of 21110121130 in words is "twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred thirty".