21000002010003 has 12 divisors (see below), whose sum is σ = 30748861391560. Its totient is φ = 13808220499296.

The previous prime is 21000002009983. The next prime is 21000002010059. The reversal of 21000002010003 is 30001020000012.

It is a happy number.

It is not a de Polignac number, because 21000002010003 - 2¹² = 21000002005907 is a prime.

It is a super-2 number, since 2×21000002010003² (a number of 27 digits) contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000002010503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15981736033 + ... + 15981737346.

Almost surely, 2^{21000002010003} is an apocalyptic number.

21000002010003 is a deficient number, since it is larger than the sum of its proper divisors (9748859381557).

21000002010003 is a wasteful number, since it uses less digits than its factorization.

21000002010003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31963473458 (or 31963473455 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 21000002010003 its reverse (30001020000012), we get a palindrome (51001022010015).

The spelling of 21000002010003 in words is "twenty-one trillion, two million, ten thousand, three".