21054233211 has 8 divisors (see below), whose sum is σ = 30624339264. Its totient is φ = 12760141320.

The previous prime is 21054233209. The next prime is 21054233269. The reversal of 21054233211 is 11233245012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21054233211 - 2¹ = 21054233209 is a prime.

It is a super-2 number, since 2×21054233211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21054233611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319003501 + ... + 319003566.

It is an arithmetic number, because the mean of its divisors is an integer number (3828042408).

Almost surely, 2^21054233211 is an apocalyptic number.

21054233211 is a deficient number, since it is larger than the sum of its proper divisors (9570106053).

21054233211 is a wasteful number, since it uses less digits than its factorization.

21054233211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638007081.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21054233211 its reverse (11233245012), we get a palindrome (32287478223).

The spelling of 21054233211 in words is "twenty-one billion, fifty-four million, two hundred thirty-three thousand, two hundred eleven".