21011222022201 has 24 divisors (see below), whose sum is σ = 30437112576000. Its totient is φ = 13967068743936.

The previous prime is 21011222022181. The next prime is 21011222022209. The reversal of 21011222022201 is 10222022211012.

It is a happy number.

21011222022201 is a `hidden beast` number, since 210 + 1 + 12 + 220 + 2 + 220 + 1 = 666.

It is not a de Polignac number, because 21011222022201 - 2⁷ = 21011222022073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21011222022209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64288800 + ... + 64614798.

It is an arithmetic number, because the mean of its divisors is an integer number (1268213024000).

Almost surely, 2^{21011222022201} is an apocalyptic number.

It is an amenable number.

21011222022201 is a deficient number, since it is larger than the sum of its proper divisors (9425890553799).

21011222022201 is a wasteful number, since it uses less digits than its factorization.

21011222022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346645 (or 346642 counting only the distinct ones).

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

Adding to 21011222022201 its reverse (10222022211012), we get a palindrome (31233244233213).

The spelling of 21011222022201 in words is "twenty-one trillion, eleven billion, two hundred twenty-two million, twenty-two thousand, two hundred one".