201021011222101 has 4 divisors (see below), whose sum is σ = 229738298539552. Its totient is φ = 172303723904652.

The previous prime is 201021011222093. The next prime is 201021011222107. The reversal of 201021011222101 is 101222110120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201021011222101 - 2³ = 201021011222093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021011222107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14358643658715 + ... + 14358643658728.

It is an arithmetic number, because the mean of its divisors is an integer number (57434574634888).

Almost surely, 2^{201021011222101} is an apocalyptic number.

It is an amenable number.

201021011222101 is a deficient number, since it is larger than the sum of its proper divisors (28717287317451).

201021011222101 is an equidigital number, since it uses as much as digits as its factorization.

201021011222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28717287317450.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201021011222101 its reverse (101222110120102), we get a palindrome (302243121342203).

The spelling of 201021011222101 in words is "two hundred one trillion, twenty-one billion, eleven million, two hundred twenty-two thousand, one hundred one".