21142120103 has 8 divisors (see below), whose sum is σ = 22769761728. Its totient is φ = 19514667744.

The previous prime is 21142120093. The next prime is 21142120117. The reversal of 21142120103 is 30102124112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21142120103 - 2⁸ = 21142119847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142120123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257426 + ... + 329472.

It is an arithmetic number, because the mean of its divisors is an integer number (2846220216).

Almost surely, 2^21142120103 is an apocalyptic number.

21142120103 is a deficient number, since it is larger than the sum of its proper divisors (1627641625).

21142120103 is a wasteful number, since it uses less digits than its factorization.

21142120103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94633.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21142120103 its reverse (30102124112), we get a palindrome (51244244215).

The spelling of 21142120103 in words is "twenty-one billion, one hundred forty-two million, one hundred twenty thousand, one hundred three".