21000223011 has 8 divisors (see below), whose sum is σ = 28459318864. Its totient is φ = 13770637920.

The previous prime is 21000222989. The next prime is 21000223021. The reversal of 21000223011 is 11032200012.

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

It is not a de Polignac number, because 21000223011 - 2¹⁰ = 21000221987 is a prime.

It is a super-2 number, since 2×21000223011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000223021) 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, 57377476 + ... + 57377841.

It is an arithmetic number, because the mean of its divisors is an integer number (3557414858).

Almost surely, 2^21000223011 is an apocalyptic number.

21000223011 is a deficient number, since it is larger than the sum of its proper divisors (7459095853).

21000223011 is a wasteful number, since it uses less digits than its factorization.

21000223011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114755381.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21000223011 its reverse (11032200012), we get a palindrome (32032423023).

The spelling of 21000223011 in words is "twenty-one billion, two hundred twenty-three thousand, eleven".