21000210011010 has 48 divisors (see below), whose sum is σ = 54601565166720. Its totient is φ = 5599951476000.

The previous prime is 21000210011009. The next prime is 21000210011111. The reversal of 21000210011010 is 1011001200012.

It is a happy number.

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 = 21000210010983 and 21000210011001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2732071 + ... + 7033109.

It is an arithmetic number, because the mean of its divisors is an integer number (1137532607640).

Almost surely, 2^{21000210011010} is an apocalyptic number.

21000210011010 is an abundant number, since it is smaller than the sum of its proper divisors (33601355155710).

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

21000210011010 is a wasteful number, since it uses less digits than its factorization.

21000210011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355303 (or 4355300 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21000210011010 its reverse (1011001200012), we get a palindrome (22011211211022).

The spelling of 21000210011010 in words is "twenty-one trillion, two hundred ten million, eleven thousand, ten".