20111200212122 has 4 divisors (see below), whose sum is σ = 30166800318186. Its totient is φ = 10055600106060.

The previous prime is 20111200212041. The next prime is 20111200212133. The reversal of 20111200212122 is 22121200211102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13502089881361 + 6609110330761 = 3674519^2 + 2570819^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20111200212122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027800053029 + ... + 5027800053032.

Almost surely, 2^{20111200212122} is an apocalyptic number.

20111200212122 is a deficient number, since it is larger than the sum of its proper divisors (10055600106064).

20111200212122 is a wasteful number, since it uses less digits than its factorization.

20111200212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055600106063.

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

Adding to 20111200212122 its reverse (22121200211102), we get a palindrome (42232400423224).

The spelling of 20111200212122 in words is "twenty trillion, one hundred eleven billion, two hundred million, two hundred twelve thousand, one hundred twenty-two".