21033223101 has 40 divisors (see below), whose sum is σ = 34788049824. Its totient is φ = 12557112480.

The previous prime is 21033223073. The next prime is 21033223111. The reversal of 21033223101 is 10132233012.

21033223101 is a `hidden beast` number, since 21 + 0 + 332 + 2 + 310 + 1 = 666.

It is not a de Polignac number, because 21033223101 - 2²¹ = 21031125949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033223111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 116470 + ... + 235863.

Almost surely, 2^21033223101 is an apocalyptic number.

It is an amenable number.

21033223101 is a deficient number, since it is larger than the sum of its proper divisors (13754826723).

21033223101 is a wasteful number, since it uses less digits than its factorization.

21033223101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352423 (or 352414 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21033223101 its reverse (10132233012), we get a palindrome (31165456113).

The spelling of 21033223101 in words is "twenty-one billion, thirty-three million, two hundred twenty-three thousand, one hundred one".