21010233351 has 16 divisors (see below), whose sum is σ = 28104754304. Its totient is φ = 13961342304.

The previous prime is 21010233323. The next prime is 21010233367. The reversal of 21010233351 is 15333201012.

It is not a de Polignac number, because 21010233351 - 2⁵ = 21010233319 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 (21010233301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1194120 + ... + 1211586.

It is an arithmetic number, because the mean of its divisors is an integer number (1756547144).

Almost surely, 2^21010233351 is an apocalyptic number.

21010233351 is a deficient number, since it is larger than the sum of its proper divisors (7094520953).

21010233351 is a wasteful number, since it uses less digits than its factorization.

21010233351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18750.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21010233351 its reverse (15333201012), we get a palindrome (36343434363).

The spelling of 21010233351 in words is "twenty-one billion, ten million, two hundred thirty-three thousand, three hundred fifty-one".