21202022121201 has 80 divisors (see below), whose sum is σ = 33321267302400. Its totient is φ = 13421973024000.

The previous prime is 21202022121197. The next prime is 21202022121209. The reversal of 21202022121201 is 10212122020212.

It is a happy number.

21202022121201 is a `hidden beast` number, since 21 + 202 + 0 + 221 + 21 + 201 = 666.

It is not a de Polignac number, because 21202022121201 - 2² = 21202022121197 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21202022121209) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 19254160 + ... + 20325518.

It is an arithmetic number, because the mean of its divisors is an integer number (416515841280).

Almost surely, 2^{21202022121201} is an apocalyptic number.

It is an amenable number.

21202022121201 is a deficient number, since it is larger than the sum of its proper divisors (12119245181199).

21202022121201 is a wasteful number, since it uses less digits than its factorization.

21202022121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071572 (or 1071563 counting only the distinct ones).

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

Adding to 21202022121201 its reverse (10212122020212), we get a palindrome (31414144141413).

The spelling of 21202022121201 in words is "twenty-one trillion, two hundred two billion, twenty-two million, one hundred twenty-one thousand, two hundred one".