21011101324 has 24 divisors (see below), whose sum is σ = 37757527808. Its totient is φ = 10226787840.

The previous prime is 21011101283. The next prime is 21011101333. The reversal of 21011101324 is 42310111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011101298 and 21011101307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420204 + ... + 467539.

Almost surely, 2^21011101324 is an apocalyptic number.

It is an amenable number.

21011101324 is a deficient number, since it is larger than the sum of its proper divisors (16746426484).

21011101324 is a wasteful number, since it uses less digits than its factorization.

21011101324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887905 (or 887903 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21011101324 its reverse (42310111012), we get a palindrome (63321212336).

The spelling of 21011101324 in words is "twenty-one billion, eleven million, one hundred one thousand, three hundred twenty-four".