20212222212 has 432 divisors, whose sum is σ = 66096156672. Its totient is φ = 5094835200.

The previous prime is 20212222193. The next prime is 20212222231. The reversal of 20212222212 is 21222221202.

20212222212 is a `hidden beast` number, since 20 + 212 + 222 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (20212222193) and next prime (20212222231).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 159151293 + ... + 159151419.

Almost surely, 2^20212222212 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 20212222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33048078336).

20212222212 is an abundant number, since it is smaller than the sum of its proper divisors (45883934460).

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

20212222212 is a wasteful number, since it uses less digits than its factorization.

20212222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20212222212 its reverse (21222221202), we get a palindrome (41434443414).

The spelling of 20212222212 in words is "twenty billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twelve".