21031201201103 has 4 divisors (see below), whose sum is σ = 21170480679408. Its totient is φ = 20891921722800.

The previous prime is 21031201201099. The next prime is 21031201201177. The reversal of 21031201201103 is 30110210213012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21031201201103 - 2² = 21031201201099 is a prime.

It is a super-2 number, since 2×21031201201103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031201201183) 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, 69639738926 + ... + 69639739227.

It is an arithmetic number, because the mean of its divisors is an integer number (5292620169852).

Almost surely, 2^{21031201201103} is an apocalyptic number.

21031201201103 is a deficient number, since it is larger than the sum of its proper divisors (139279478305).

21031201201103 is a wasteful number, since it uses less digits than its factorization.

21031201201103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139279478304.

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

Adding to 21031201201103 its reverse (30110210213012), we get a palindrome (51141411414115).

The spelling of 21031201201103 in words is "twenty-one trillion, thirty-one billion, two hundred one million, two hundred one thousand, one hundred three".