21011606120103 has 8 divisors (see below), whose sum is σ = 28015515830016. Its totient is φ = 14007716911800.

The previous prime is 21011606120101. The next prime is 21011606120107. The reversal of 21011606120103 is 30102160611012.

It is a happy number.

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

It is not a de Polignac number, because 21011606120103 - 2¹ = 21011606120101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011606120101) 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, 2549013 + ... + 6965678.

It is an arithmetic number, because the mean of its divisors is an integer number (3501939478752).

Almost surely, 2^{21011606120103} is an apocalyptic number.

21011606120103 is a deficient number, since it is larger than the sum of its proper divisors (7003909709913).

21011606120103 is an equidigital number, since it uses as much as digits as its factorization.

21011606120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250805.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 21011606120103 its reverse (30102160611012), we get a palindrome (51113766731115).

The spelling of 21011606120103 in words is "twenty-one trillion, eleven billion, six hundred six million, one hundred twenty thousand, one hundred three".