2121022212 has 48 divisors (see below), whose sum is σ = 5239738560. Its totient is φ = 665912448.

The previous prime is 2121022181. The next prime is 2121022219. The reversal of 2121022212 is 2122201212.

It is a junction number, because it is equal to n+sod(n) for n = 2121022191 and 2121022200.

It is not an unprimeable number, because it can be changed into a prime (2121022219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12558 + ... + 66330.

It is an arithmetic number, because the mean of its divisors is an integer number (109161220).

Almost surely, 2^2121022212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121022212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2619869280).

2121022212 is an abundant number, since it is smaller than the sum of its proper divisors (3118716348).

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

2121022212 is a wasteful number, since it uses less digits than its factorization.

2121022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53972 (or 53970 counting only the distinct ones).

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

The square root of 2121022212 is about 46054.5569080846. The cubic root of 2121022212 is about 1284.8380971612.

Adding to 2121022212 its reverse (2122201212), we get a palindrome (4243223424).

The spelling of 2121022212 in words is "two billion, one hundred twenty-one million, twenty-two thousand, two hundred twelve".