20212111220212 has 18 divisors (see below), whose sum is σ = 37574244822422. Its totient is φ = 9511581750144.

The previous prime is 20212111220179. The next prime is 20212111220299. The reversal of 20212111220212 is 21202211121202.

It can be written as a sum of positive squares in 3 ways, for example, as 10660525382116 + 9551585838096 = 3265046^2 + 3090564^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20212111220212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8742261483 + ... + 8742263794.

Almost surely, 2^{20212111220212} is an apocalyptic number.

It is an amenable number.

20212111220212 is a deficient number, since it is larger than the sum of its proper divisors (17362133602210).

20212111220212 is a wasteful number, since it uses less digits than its factorization.

20212111220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17484525315 (or 17484525296 counting only the distinct ones).

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

Adding to 20212111220212 its reverse (21202211121202), we get a palindrome (41414322341414).

It can be divided in two parts, 2021211 and 1220212, that added together give a palindrome (3241423).

The spelling of 20212111220212 in words is "twenty trillion, two hundred twelve billion, one hundred eleven million, two hundred twenty thousand, two hundred twelve".