12211210111020 has 48 divisors (see below), whose sum is σ = 35677970415360. Its totient is φ = 3114743448256.

The previous prime is 12211210110959. The next prime is 12211210111033. The reversal of 12211210111020 is 2011101211221.

It is a happy number.

It is a super-2 number, since 2×12211210111020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4424350110 + ... + 4424352869.

It is an arithmetic number, because the mean of its divisors is an integer number (743291050320).

Almost surely, 2^{12211210111020} is an apocalyptic number.

12211210111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211210111020 is an abundant number, since it is smaller than the sum of its proper divisors (23466760304340).

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

12211210111020 is a wasteful number, since it uses less digits than its factorization.

12211210111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8848703014 (or 8848703012 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12211210111020 its reverse (2011101211221), we get a palindrome (14222311322241).

The spelling of 12211210111020 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, one hundred eleven thousand, twenty".