21031023411 has 32 divisors (see below), whose sum is σ = 32864652800. Its totient is φ = 13255319520.

The previous prime is 21031023361. The next prime is 21031023427. The reversal of 21031023411 is 11432013012.

21031023411 is a `hidden beast` number, since 2 + 10 + 310 + 2 + 341 + 1 = 666.

It is not a de Polignac number, because 21031023411 - 2⁶ = 21031023347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031023311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207741 + ... + 291921.

It is an arithmetic number, because the mean of its divisors is an integer number (1027020400).

Almost surely, 2^21031023411 is an apocalyptic number.

21031023411 is a deficient number, since it is larger than the sum of its proper divisors (11833629389).

21031023411 is a wasteful number, since it uses less digits than its factorization.

21031023411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84696 (or 84690 counting only the distinct ones).

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

Adding to 21031023411 its reverse (11432013012), we get a palindrome (32463036423).

The spelling of 21031023411 in words is "twenty-one billion, thirty-one million, twenty-three thousand, four hundred eleven".