21103202113001 has 4 divisors (see below), whose sum is σ = 21203217289104. Its totient is φ = 21003186936900.

The previous prime is 21103202112997. The next prime is 21103202113003. The reversal of 21103202113001 is 10031120230112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21103202113001 - 2² = 21103202112997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21103202113003) 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, 50007587735 + ... + 50007588156.

It is an arithmetic number, because the mean of its divisors is an integer number (5300804322276).

Almost surely, 2^{21103202113001} is an apocalyptic number.

It is an amenable number.

21103202113001 is a deficient number, since it is larger than the sum of its proper divisors (100015176103).

21103202113001 is a wasteful number, since it uses less digits than its factorization.

21103202113001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100015176102.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21103202113001 its reverse (10031120230112), we get a palindrome (31134322343113).

The spelling of 21103202113001 in words is "twenty-one trillion, one hundred three billion, two hundred two million, one hundred thirteen thousand, one".