21142101403 has 4 divisors (see below), whose sum is σ = 21145792360. Its totient is φ = 21138410448.

The previous prime is 21142101373. The next prime is 21142101419. The reversal of 21142101403 is 30410124112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21142101403 - 2¹³ = 21142093211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142101503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836873 + ... + 1848346.

It is an arithmetic number, because the mean of its divisors is an integer number (5286448090).

Almost surely, 2^21142101403 is an apocalyptic number.

21142101403 is a deficient number, since it is larger than the sum of its proper divisors (3690957).

21142101403 is an equidigital number, since it uses as much as digits as its factorization.

21142101403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690956.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21142101403 its reverse (30410124112), we get a palindrome (51552225515).

The spelling of 21142101403 in words is "twenty-one billion, one hundred forty-two million, one hundred one thousand, four hundred three".