201011220121 has 4 divisors (see below), whose sum is σ = 201963880144. Its totient is φ = 200058560100.

The previous prime is 201011220079. The next prime is 201011220131. The reversal of 201011220121 is 121022110102.

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 201011220121 - 2¹¹ = 201011218073 is a prime.

It is a super-2 number, since 2×201011220121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201011220131) 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, 476329695 + ... + 476330116.

It is an arithmetic number, because the mean of its divisors is an integer number (50490970036).

Almost surely, 2^201011220121 is an apocalyptic number.

It is an amenable number.

201011220121 is a deficient number, since it is larger than the sum of its proper divisors (952660023).

201011220121 is an equidigital number, since it uses as much as digits as its factorization.

201011220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952660022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201011220121 its reverse (121022110102), we get a palindrome (322033330223).

The spelling of 201011220121 in words is "two hundred one billion, eleven million, two hundred twenty thousand, one hundred twenty-one".