21013102013403 has 16 divisors (see below), whose sum is σ = 28060381121696. Its totient is φ = 13987294064640.

The previous prime is 21013102013333. The next prime is 21013102013417. The reversal of 21013102013403 is 30431020131012.

It is not a de Polignac number, because 21013102013403 - 2⁹ = 21013102012891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21013102013403.

It is not an unprimeable number, because it can be changed into a prime (21013102013503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3599043 + ... + 7414803.

It is an arithmetic number, because the mean of its divisors is an integer number (1753773820106).

Almost surely, 2^{21013102013403} is an apocalyptic number.

21013102013403 is a deficient number, since it is larger than the sum of its proper divisors (7047279108293).

21013102013403 is a wasteful number, since it uses less digits than its factorization.

21013102013403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818574.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21013102013403 its reverse (30431020131012), we get a palindrome (51444122144415).

The spelling of 21013102013403 in words is "twenty-one trillion, thirteen billion, one hundred two million, thirteen thousand, four hundred three".