21003311010 has 64 divisors (see below), whose sum is σ = 55008180864. Its totient is φ = 5090073600.

The previous prime is 21003311009. The next prime is 21003311033. The reversal of 21003311010 is 1011330012.

It is a super-2 number, since 2×21003311010² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1252602 + ... + 1269258.

It is an arithmetic number, because the mean of its divisors is an integer number (859502826).

Almost surely, 2^21003311010 is an apocalyptic number.

21003311010 is an abundant number, since it is smaller than the sum of its proper divisors (34004869854).

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

21003311010 is a wasteful number, since it uses less digits than its factorization.

21003311010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20499.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21003311010 its reverse (1011330012), we get a palindrome (22014641022).

The spelling of 21003311010 in words is "twenty-one billion, three million, three hundred eleven thousand, ten".