21011320310010 has 64 divisors (see below), whose sum is σ = 51037990133760. Its totient is φ = 5535158345280.

The previous prime is 21011320310003. The next prime is 21011320310017. The reversal of 21011320310010 is 1001302311012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21011320310003) and next prime (21011320310017).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21011320310017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39854511 + ... + 40378269.

It is an arithmetic number, because the mean of its divisors is an integer number (797468595840).

Almost surely, 2^{21011320310010} is an apocalyptic number.

21011320310010 is an abundant number, since it is smaller than the sum of its proper divisors (30026669823750).

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

21011320310010 is a wasteful number, since it uses less digits than its factorization.

21011320310010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539963.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21011320310010 its reverse (1001302311012), we get a palindrome (22012622621022).

The spelling of 21011320310010 in words is "twenty-one trillion, eleven billion, three hundred twenty million, three hundred ten thousand, ten".