20212121220202 has 8 divisors (see below), whose sum is σ = 30339427932576. Its totient is φ = 10098978576012.

The previous prime is 20212121220157. The next prime is 20212121220217. The reversal of 20212121220202 is 20202212121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20212121220202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3541013478 + ... + 3541019185.

It is an arithmetic number, because the mean of its divisors is an integer number (3792428491572).

Almost surely, 2^{20212121220202} is an apocalyptic number.

20212121220202 is a deficient number, since it is larger than the sum of its proper divisors (10127306712374).

20212121220202 is a wasteful number, since it uses less digits than its factorization.

20212121220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7082034092.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212121220202 its reverse (20202212121202), we get a palindrome (40414333341404).

The spelling of 20212121220202 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, two hundred two".