21122153043 has 8 divisors (see below), whose sum is σ = 28335649728. Its totient is φ = 13995045864.

The previous prime is 21122152999. The next prime is 21122153051. The reversal of 21122153043 is 34035122112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21122153043 - 2⁹ = 21122152531 is a prime.

It is a super-2 number, since 2×21122153043² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122153053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21596805 + ... + 21597782.

It is an arithmetic number, because the mean of its divisors is an integer number (3541956216).

Almost surely, 2^21122153043 is an apocalyptic number.

21122153043 is a deficient number, since it is larger than the sum of its proper divisors (7213496685).

21122153043 is a wasteful number, since it uses less digits than its factorization.

21122153043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43194753.

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

Adding to 21122153043 its reverse (34035122112), we get a palindrome (55157275155).

The spelling of 21122153043 in words is "twenty-one billion, one hundred twenty-two million, one hundred fifty-three thousand, forty-three".