202111121022101 has 4 divisors (see below), whose sum is σ = 202800920070252. Its totient is φ = 201421321973952.

The previous prime is 202111121022073. The next prime is 202111121022179. The reversal of 202111121022101 is 101220121111202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 155303288381476 + 46807832640625 = 12462074^2 + 6841625^2 .

It is a cyclic number.

It is not a de Polignac number, because 202111121022101 - 2³⁰ = 202110047280277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202111121022101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202111121022901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344899523636 + ... + 344899524221.

It is an arithmetic number, because the mean of its divisors is an integer number (50700230017563).

Almost surely, 2^{202111121022101} is an apocalyptic number.

It is an amenable number.

202111121022101 is a deficient number, since it is larger than the sum of its proper divisors (689799048151).

202111121022101 is an equidigital number, since it uses as much as digits as its factorization.

202111121022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689799048150.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 202111121022101 its reverse (101220121111202), we get a palindrome (303331242133303).

The spelling of 202111121022101 in words is "two hundred two trillion, one hundred eleven billion, one hundred twenty-one million, twenty-two thousand, one hundred one".