21122301123 has 64 divisors (see below), whose sum is σ = 39176586240. Its totient is φ = 10926835200.

The previous prime is 21122301043. The next prime is 21122301173. The reversal of 21122301123 is 32110322112.

It is not a de Polignac number, because 21122301123 - 2³² = 16827333827 is a prime.

It is a super-2 number, since 2×21122301123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122301096 and 21122301105.

It is not an unprimeable number, because it can be changed into a prime (21122301173) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 479961 + ... + 522117.

It is an arithmetic number, because the mean of its divisors is an integer number (612134160).

Almost surely, 2^21122301123 is an apocalyptic number.

21122301123 is a deficient number, since it is larger than the sum of its proper divisors (18054285117).

21122301123 is a wasteful number, since it uses less digits than its factorization.

21122301123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42425 (or 42419 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21122301123 its reverse (32110322112), we get a palindrome (53232623235).

The spelling of 21122301123 in words is "twenty-one billion, one hundred twenty-two million, three hundred one thousand, one hundred twenty-three".