202121221101 has 8 divisors (see below), whose sum is σ = 273912911904. Its totient is φ = 132538505520.

The previous prime is 202121221037. The next prime is 202121221129. The reversal of 202121221101 is 101122121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202121221101 - 2⁶ = 202121221037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552243591 + ... + 552243956.

It is an arithmetic number, because the mean of its divisors is an integer number (34239113988).

Almost surely, 2^202121221101 is an apocalyptic number.

It is an amenable number.

202121221101 is a deficient number, since it is larger than the sum of its proper divisors (71791690803).

202121221101 is a wasteful number, since it uses less digits than its factorization.

202121221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104487611.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202121221101 its reverse (101122121202), we get a palindrome (303243342303).

The spelling of 202121221101 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred one".