21101102021203 has 8 divisors (see below), whose sum is σ = 21213041331456. Its totient is φ = 20989177944000.

The previous prime is 21101102021173. The next prime is 21101102021243. The reversal of 21101102021203 is 30212020110112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21101102021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101102021243) 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, 1025098 + ... + 6576703.

It is an arithmetic number, because the mean of its divisors is an integer number (2651630166432).

Almost surely, 2^{21101102021203} is an apocalyptic number.

21101102021203 is a deficient number, since it is larger than the sum of its proper divisors (111939310253).

21101102021203 is a wasteful number, since it uses less digits than its factorization.

21101102021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616525.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21101102021203 its reverse (30212020110112), we get a palindrome (51313122131315).

The spelling of 21101102021203 in words is "twenty-one trillion, one hundred one billion, one hundred two million, twenty-one thousand, two hundred three".