201221220011012 has 12 divisors (see below), whose sum is σ = 356960931389916. Its totient is φ = 99232382471040.

The previous prime is 201221220010973. The next prime is 201221220011023. The reversal of 201221220011012 is 210110022122102.

It can be written as a sum of positive squares in 2 ways, for example, as 168222560164096 + 32998659846916 = 12970064^2 + 5744446^2 .

It is a super-2 number, since 2×201221220011012² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344556883289 + ... + 344556883872.

It is an arithmetic number, because the mean of its divisors is an integer number (29746744282493).

Almost surely, 2^{201221220011012} is an apocalyptic number.

It is an amenable number.

201221220011012 is a deficient number, since it is larger than the sum of its proper divisors (155739711378904).

201221220011012 is a wasteful number, since it uses less digits than its factorization.

201221220011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689113767238 (or 689113767236 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201221220011012 its reverse (210110022122102), we get a palindrome (411331242133114).

The spelling of 201221220011012 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twenty million, eleven thousand, twelve".