201011022012121 has 4 divisors (see below), whose sum is σ = 201011148739044. Its totient is φ = 201010895285200.

The previous prime is 201011022012091. The next prime is 201011022012167. The reversal of 201011022012121 is 121210220110102.

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 52847084160000 + 148163937852121 = 7269600^2 + 12172261^2 .

It is a cyclic number.

It is not a de Polignac number, because 201011022012121 - 2²⁷ = 201010887794393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011022012095 and 201011022012104.

It is not an unprimeable number, because it can be changed into a prime (201011022012181) 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 3 ways as a sum of consecutive naturals, for example, 60953650 + ... + 64166731.

It is an arithmetic number, because the mean of its divisors is an integer number (50252787184761).

Almost surely, 2^{201011022012121} is an apocalyptic number.

It is an amenable number.

201011022012121 is a deficient number, since it is larger than the sum of its proper divisors (126726923).

201011022012121 is a wasteful number, since it uses less digits than its factorization.

201011022012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126726922.

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

Adding to 201011022012121 its reverse (121210220110102), we get a palindrome (322221242122223).

The spelling of 201011022012121 in words is "two hundred one trillion, eleven billion, twenty-two million, twelve thousand, one hundred twenty-one".