21002232023211 has 16 divisors (see below), whose sum is σ = 28285153509888. Its totient is φ = 13860588789600.

The previous prime is 21002232023209. The next prime is 21002232023317. The reversal of 21002232023211 is 11232023220012.

It is not a de Polignac number, because 21002232023211 - 2¹ = 21002232023209 is a prime.

It is a super-2 number, since 2×21002232023211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002232043211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23245155 + ... + 24131756.

It is an arithmetic number, because the mean of its divisors is an integer number (1767822094368).

Almost surely, 2^{21002232023211} is an apocalyptic number.

21002232023211 is a deficient number, since it is larger than the sum of its proper divisors (7282921486677).

21002232023211 is a wasteful number, since it uses less digits than its factorization.

21002232023211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47378402.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21002232023211 its reverse (11232023220012), we get a palindrome (32234255243223).

The spelling of 21002232023211 in words is "twenty-one trillion, two billion, two hundred thirty-two million, twenty-three thousand, two hundred eleven".