21001010022003 has 32 divisors (see below), whose sum is σ = 31905037946880. Its totient is φ = 12163045134240.

The previous prime is 21001010021969. The next prime is 21001010022037. The reversal of 21001010022003 is 30022001010012.

It is an interprime number because it is at equal distance from previous prime (21001010021969) and next prime (21001010022037).

It is not a de Polignac number, because 21001010022003 - 2¹³ = 21001010013811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21001010022003.

It is not an unprimeable number, because it can be changed into a prime (21001010022073) 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, 12207913 + ... + 13821546.

It is an arithmetic number, because the mean of its divisors is an integer number (997032435840).

Almost surely, 2^{21001010022003} is an apocalyptic number.

21001010022003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21001010022003 is a deficient number, since it is larger than the sum of its proper divisors (10904027924877).

21001010022003 is a wasteful number, since it uses less digits than its factorization.

21001010022003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26030559.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21001010022003 its reverse (30022001010012), we get a palindrome (51023011032015).

The spelling of 21001010022003 in words is "twenty-one trillion, one billion, ten million, twenty-two thousand, three".