21003111002 has 16 divisors (see below), whose sum is σ = 31739215200. Its totient is φ = 10423410480.

The previous prime is 21003110993. The next prime is 21003111011. The reversal of 21003111002 is 20011130012.

It is an interprime number because it is at equal distance from previous prime (21003110993) and next prime (21003111011).

It is a super-3 number, since 3×21003111002³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611749 + ... + 1624727.

It is an arithmetic number, because the mean of its divisors is an integer number (1983700950).

Almost surely, 2^21003111002 is an apocalyptic number.

21003111002 is a deficient number, since it is larger than the sum of its proper divisors (10736104198).

21003111002 is a wasteful number, since it uses less digits than its factorization.

21003111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18941.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21003111002 its reverse (20011130012), we get a palindrome (41014241014).

The spelling of 21003111002 in words is "twenty-one billion, three million, one hundred eleven thousand, two".