201100221222021 has 24 divisors (see below), whose sum is σ = 317002867455456. Its totient is φ = 121833664115040.

The previous prime is 201100221221989. The next prime is 201100221222031. The reversal of 201100221222021 is 120222122001102.

It is a happy number.

201100221222021 is a `hidden beast` number, since 201 + 1 + 0 + 0 + 221 + 2 + 220 + 21 = 666.

It is not a de Polignac number, because 201100221222021 - 2⁵ = 201100221221989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201100221221985 and 201100221222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100221222031) 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, 376880695 + ... + 377413908.

It is an arithmetic number, because the mean of its divisors is an integer number (13208452810644).

Almost surely, 2^{201100221222021} is an apocalyptic number.

It is an amenable number.

201100221222021 is a deficient number, since it is larger than the sum of its proper divisors (115902646233435).

201100221222021 is a wasteful number, since it uses less digits than its factorization.

201100221222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754297313 (or 754297310 counting only the distinct ones).

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

Adding to 201100221222021 its reverse (120222122001102), we get a palindrome (321322343223123).

The spelling of 201100221222021 in words is "two hundred one trillion, one hundred billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-one".