20211202021212 has 72 divisors (see below), whose sum is σ = 52960598950896. Its totient is φ = 6493722856704.

The previous prime is 20211202021187. The next prime is 20211202021237. The reversal of 20211202021212 is 21212020211202.

It is a happy number.

20211202021212 is a `hidden beast` number, since 20 + 211 + 20 + 202 + 1 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (20211202021187) and next prime (20211202021237).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70762033 + ... + 71047080.

It is an arithmetic number, because the mean of its divisors is an integer number (735563874318).

Almost surely, 2^{20211202021212} is an apocalyptic number.

It is an amenable number.

20211202021212 is an abundant number, since it is smaller than the sum of its proper divisors (32749396929684).

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

20211202021212 is a wasteful number, since it uses less digits than its factorization.

20211202021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141809267 (or 141809262 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20211202021212 its reverse (21212020211202), we get a palindrome (41423222232414).

The spelling of 20211202021212 in words is "twenty trillion, two hundred eleven billion, two hundred two million, twenty-one thousand, two hundred twelve".