21233134103021 has 4 divisors (see below), whose sum is σ = 22482141991452. Its totient is φ = 19984126214592.

The previous prime is 21233134102949. The next prime is 21233134103039. The reversal of 21233134103021 is 12030143133212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13238864175625 + 7994269927396 = 3638525^2 + 2827414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233134103021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233134103921) 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, 624503944190 + ... + 624503944223.

It is an arithmetic number, because the mean of its divisors is an integer number (5620535497863).

Almost surely, 2^{21233134103021} is an apocalyptic number.

It is an amenable number.

21233134103021 is a deficient number, since it is larger than the sum of its proper divisors (1249007888431).

21233134103021 is a wasteful number, since it uses less digits than its factorization.

21233134103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249007888430.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21233134103021 its reverse (12030143133212), we get a palindrome (33263277236233).

The spelling of 21233134103021 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred thirty-four million, one hundred three thousand, twenty-one".