21002122022211 has 192 divisors, whose sum is σ = 36949095912960. Its totient is φ = 11684207646720.

The previous prime is 21002122022207. The next prime is 21002122022221. The reversal of 21002122022211 is 11222022120012.

It is a happy number.

21002122022211 is a `hidden beast` number, since 210 + 0 + 2 + 1 + 220 + 22 + 211 = 666.

It is not a de Polignac number, because 21002122022211 - 2² = 21002122022207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002122022221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2793946225 + ... + 2793953741.

It is an arithmetic number, because the mean of its divisors is an integer number (192443207880).

Almost surely, 2^{21002122022211} is an apocalyptic number.

21002122022211 is a deficient number, since it is larger than the sum of its proper divisors (15946973890749).

21002122022211 is a wasteful number, since it uses less digits than its factorization.

21002122022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371 (or 8348 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21002122022211 its reverse (11222022120012), we get a palindrome (32224144142223).

The spelling of 21002122022211 in words is "twenty-one trillion, two billion, one hundred twenty-two million, twenty-two thousand, two hundred eleven".