21123314030 has 64 divisors (see below), whose sum is σ = 49259266560. Its totient is φ = 6333323904.

The previous prime is 21123314029. The next prime is 21123314033. The reversal of 21123314030 is 3041332112.

It is a junction number, because it is equal to n+sod(n) for n = 21123313993 and 21123314011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123314033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593564 + ... + 628143.

It is an arithmetic number, because the mean of its divisors is an integer number (769676040).

Almost surely, 2^21123314030 is an apocalyptic number.

21123314030 is an abundant number, since it is smaller than the sum of its proper divisors (28135952530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21123314030 is a wasteful number, since it uses less digits than its factorization.

21123314030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221753.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21123314030 its reverse (3041332112), we get a palindrome (24164646142).

The spelling of 21123314030 in words is "twenty-one billion, one hundred twenty-three million, three hundred fourteen thousand, thirty".