201121221110212 has 48 divisors (see below), whose sum is σ = 379130181487792. Its totient is φ = 92802153185280.

The previous prime is 201121221110177. The next prime is 201121221110221. The reversal of 201121221110212 is 212011122121102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4203541464516 + 196917679645696 = 2050254^2 + 14032736^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201121221110212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5061798298 + ... + 5061838030.

Almost surely, 2^{201121221110212} is an apocalyptic number.

It is an amenable number.

201121221110212 is a deficient number, since it is larger than the sum of its proper divisors (178008960377580).

201121221110212 is a wasteful number, since it uses less digits than its factorization.

201121221110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61448 (or 61446 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201121221110212 its reverse (212011122121102), we get a palindrome (413132343231314).

The spelling of 201121221110212 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, two hundred twelve".