20111222012212 has 6 divisors (see below), whose sum is σ = 35194638521378. Its totient is φ = 10055611006104.

The previous prime is 20111222012209. The next prime is 20111222012243. The reversal of 20111222012212 is 21221022211102.

It can be written as a sum of positive squares in only one way, i.e., 10524742802596 + 9586479209616 = 3244186^2 + 3096204^2 .

It is a super-2 number, since 2×20111222012212² (a number of 27 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 20111222012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513902751523 + ... + 2513902751530.

Almost surely, 2^{20111222012212} is an apocalyptic number.

It is an amenable number.

20111222012212 is a deficient number, since it is larger than the sum of its proper divisors (15083416509166).

20111222012212 is a wasteful number, since it uses less digits than its factorization.

20111222012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027805503057 (or 5027805503055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20111222012212 its reverse (21221022211102), we get a palindrome (41332244223314).

The spelling of 20111222012212 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-two million, twelve thousand, two hundred twelve".