21122014024 has 8 divisors (see below), whose sum is σ = 39603776310. Its totient is φ = 10561007008.

The previous prime is 21122014013. The next prime is 21122014027. The reversal of 21122014024 is 42041022112.

It can be written as a sum of positive squares in only one way, i.e., 20914365924 + 207648100 = 144618^2 + 14410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21122014024² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122013992 and 21122014010.

It is not an unprimeable number, because it can be changed into a prime (21122014027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320125869 + ... + 1320125884.

Almost surely, 2^21122014024 is an apocalyptic number.

It is an amenable number.

21122014024 is a deficient number, since it is larger than the sum of its proper divisors (18481762286).

21122014024 is a wasteful number, since it uses less digits than its factorization.

21122014024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640251759 (or 2640251755 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21122014024 its reverse (42041022112), we get a palindrome (63163036136).

The spelling of 21122014024 in words is "twenty-one billion, one hundred twenty-two million, fourteen thousand, twenty-four".