21032103101 has 4 divisors (see below), whose sum is σ = 21171388704. Its totient is φ = 20892817500.

The previous prime is 21032103083. The next prime is 21032103119. The reversal of 21032103101 is 10130123012.

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 an interprime number because it is at equal distance from previous prime (21032103083) and next prime (21032103119).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21032103101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032103151) 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, 69642575 + ... + 69642876.

It is an arithmetic number, because the mean of its divisors is an integer number (5292847176).

Almost surely, 2^21032103101 is an apocalyptic number.

It is an amenable number.

21032103101 is a deficient number, since it is larger than the sum of its proper divisors (139285603).

21032103101 is a wasteful number, since it uses less digits than its factorization.

21032103101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139285602.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21032103101 its reverse (10130123012), we get a palindrome (31162226113).

The spelling of 21032103101 in words is "twenty-one billion, thirty-two million, one hundred three thousand, one hundred one".