21122370753 has 16 divisors (see below), whose sum is σ = 31227114432. Its totient is φ = 12591576000.

The previous prime is 21122370743. The next prime is 21122370803. The reversal of 21122370753 is 35707322112.

It is not a de Polignac number, because 21122370753 - 2⁸ = 21122370497 is a prime.

It is a super-3 number, since 3×21122370753³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (21122370743) 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, 5244478 + ... + 5248503.

It is an arithmetic number, because the mean of its divisors is an integer number (1951694652).

Almost surely, 2^21122370753 is an apocalyptic number.

It is an amenable number.

21122370753 is a deficient number, since it is larger than the sum of its proper divisors (10104743679).

21122370753 is a wasteful number, since it uses less digits than its factorization.

21122370753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493056.

The product of its (nonzero) digits is 17640, while the sum is 33.

Adding to 21122370753 its reverse (35707322112), we get a palindrome (56829692865).

The spelling of 21122370753 in words is "twenty-one billion, one hundred twenty-two million, three hundred seventy thousand, seven hundred fifty-three".