20212121202 has 256 divisors, whose sum is σ = 54551024640. Its totient is φ = 4841275392.

The previous prime is 20212121201. The next prime is 20212121227.

20212121202 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20212121201) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 78646258 + ... + 78646514.

It is an arithmetic number, because the mean of its divisors is an integer number (213089940).

Almost surely, 2^20212121202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212121202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27275512320).

20212121202 is an abundant number, since it is smaller than the sum of its proper divisors (34338903438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20212121202 is a wasteful number, since it uses less digits than its factorization.

20212121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its (nonzero) digits is 64, while the sum is 15.

The spelling of 20212121202 in words is "twenty billion, two hundred twelve million, one hundred twenty-one thousand, two hundred two".