21110300010 has 48 divisors (see below), whose sum is σ = 54992251080. Its totient is φ = 5618595840.

The previous prime is 21110299981. The next prime is 21110300017. The reversal of 21110300010 is 1000301112.

It can be written as a sum of positive squares in 4 ways, for example, as 10602614961 + 10507685049 = 102969^2 + 102507^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21110299965 and 21110300001.

It is not an unprimeable number, because it can be changed into a prime (21110300017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178215 + ... + 271994.

Almost surely, 2^21110300010 is an apocalyptic number.

21110300010 is an abundant number, since it is smaller than the sum of its proper divisors (33881951070).

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

21110300010 is a wasteful number, since it uses less digits than its factorization.

21110300010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450743 (or 450740 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 21110300010 its reverse (1000301112), we get a palindrome (22110601122).

The spelling of 21110300010 in words is "twenty-one billion, one hundred ten million, three hundred thousand, ten".