21122043513 has 32 divisors (see below), whose sum is σ = 29198612352. Its totient is φ = 13572748800.

The previous prime is 21122043511. The next prime is 21122043529. The reversal of 21122043513 is 31534022112.

It is not a de Polignac number, because 21122043513 - 2¹ = 21122043511 is a prime.

It is a super-2 number, since 2×21122043513² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122043511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3492270 + ... + 3498312.

It is an arithmetic number, because the mean of its divisors is an integer number (912456636).

Almost surely, 2^21122043513 is an apocalyptic number.

It is an amenable number.

21122043513 is a deficient number, since it is larger than the sum of its proper divisors (8076568839).

21122043513 is a wasteful number, since it uses less digits than its factorization.

21122043513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21122043513 its reverse (31534022112), we get a palindrome (52656065625).

The spelling of 21122043513 in words is "twenty-one billion, one hundred twenty-two million, forty-three thousand, five hundred thirteen".