21202142003 has 16 divisors (see below), whose sum is σ = 25289349120. Its totient is φ = 17379818016.

The previous prime is 21202141981. The next prime is 21202142011. The reversal of 21202142003 is 30024120212.

It is a cyclic number.

It is not a de Polignac number, because 21202142003 - 2³² = 16907174707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202142803) 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, 1201478 + ... + 1218996.

It is an arithmetic number, because the mean of its divisors is an integer number (1580584320).

Almost surely, 2^21202142003 is an apocalyptic number.

21202142003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21202142003 is a deficient number, since it is larger than the sum of its proper divisors (4087207117).

21202142003 is a wasteful number, since it uses less digits than its factorization.

21202142003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25066.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21202142003 its reverse (30024120212), we get a palindrome (51226262215).

The spelling of 21202142003 in words is "twenty-one billion, two hundred two million, one hundred forty-two thousand, three".