2121211112212 has 12 divisors (see below), whose sum is σ = 3750388719700. Its totient is φ = 1049671478016.

The previous prime is 2121211112197. The next prime is 2121211112219. The reversal of 2121211112212 is 2122111121212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1156816406916 + 964394705296 = 1075554^2 + 982036^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2121211112212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121211112219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2733519087 + ... + 2733519862.

Almost surely, 2^{2121211112212} is an apocalyptic number.

It is an amenable number.

2121211112212 is a deficient number, since it is larger than the sum of its proper divisors (1629177607488).

2121211112212 is a wasteful number, since it uses less digits than its factorization.

2121211112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5467039050 (or 5467039048 counting only the distinct ones).

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

Adding to 2121211112212 its reverse (2122111121212), we get a palindrome (4243322233424).

The spelling of 2121211112212 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred twelve".