12211212020 has 48 divisors (see below), whose sum is σ = 29329872768. Its totient is φ = 4183420800.

The previous prime is 12211212019. The next prime is 12211212023. The reversal of 12211212020 is 2021211221.

It is a super-2 number, since 2×12211212020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 12211211986 and 12211212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211212023) 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, 148619 + ... + 215661.

It is an arithmetic number, because the mean of its divisors is an integer number (611039016).

Almost surely, 2^12211212020 is an apocalyptic number.

12211212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211212020 is an abundant number, since it is smaller than the sum of its proper divisors (17118660748).

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

12211212020 is a wasteful number, since it uses less digits than its factorization.

12211212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68360 (or 68358 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12211212020 its reverse (2021211221), we get a palindrome (14232423241).

The spelling of 12211212020 in words is "twelve billion, two hundred eleven million, two hundred twelve thousand, twenty".