20212121211202 has 16 divisors (see below), whose sum is σ = 31368955467960. Its totient is φ = 9755920924288.

The previous prime is 20212121211187. The next prime is 20212121211211. The reversal of 20212121211202 is 20211212121202.

It can be written as a sum of positive squares in 4 ways, for example, as 20211956884441 + 164326761 = 4495771^2 + 12819^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20212121211202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29205613 + ... + 29889664.

Almost surely, 2^{20212121211202} is an apocalyptic number.

20212121211202 is a deficient number, since it is larger than the sum of its proper divisors (11156834256758).

20212121211202 is a wasteful number, since it uses less digits than its factorization.

20212121211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59101205.

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

Adding to 20212121211202 its reverse (20211212121202), we get a palindrome (40423333332404).

The spelling of 20212121211202 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, two hundred two".