201011222121 has 16 divisors (see below), whose sum is σ = 275510614464. Its totient is φ = 130266287424.

The previous prime is 201011222077. The next prime is 201011222123. The reversal of 201011222121 is 121222110102.

It is not a de Polignac number, because 201011222121 - 2¹¹ = 201011220073 is a prime.

It is a super-2 number, since 2×201011222121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201011222121.

It is not an unprimeable number, because it can be changed into a prime (201011222123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707091 + ... + 949736.

It is an arithmetic number, because the mean of its divisors is an integer number (17219413404).

Almost surely, 2^201011222121 is an apocalyptic number.

It is an amenable number.

201011222121 is a deficient number, since it is larger than the sum of its proper divisors (74499392343).

201011222121 is a wasteful number, since it uses less digits than its factorization.

201011222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657960.

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

Adding to 201011222121 its reverse (121222110102), we get a palindrome (322233332223).

The spelling of 201011222121 in words is "two hundred one billion, eleven million, two hundred twenty-two thousand, one hundred twenty-one".