21111012130 has 16 divisors (see below), whose sum is σ = 40922885304. Its totient is φ = 7794835200.

The previous prime is 21111012071. The next prime is 21111012163. The reversal of 21111012130 is 3121011112.

It is a happy number.

21111012130 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14918423881 + 6192588249 = 122141^2 + 78693^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 21111012130.

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, 81196071 + ... + 81196330.

Almost surely, 2^21111012130 is an apocalyptic number.

21111012130 is a deficient number, since it is larger than the sum of its proper divisors (19811873174).

21111012130 is a wasteful number, since it uses less digits than its factorization.

21111012130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162392421.

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

Adding to 21111012130 its reverse (3121011112), we get a palindrome (24232023242).

The spelling of 21111012130 in words is "twenty-one billion, one hundred eleven million, twelve thousand, one hundred thirty".