12211111101220 has 24 divisors (see below), whose sum is σ = 25815436227000. Its totient is φ = 4851662932992.

The previous prime is 12211111101193. The next prime is 12211111101269. The reversal of 12211111101220 is 2210111111221.

It can be written as a sum of positive squares in 4 ways, for example, as 2640911007744 + 9570200093476 = 1625088^2 + 3093574^2 .

It is a super-2 number, since 2×12211111101220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211111101194 and 12211111101203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048841165 + ... + 2048847124.

It is an arithmetic number, because the mean of its divisors is an integer number (1075643176125).

Almost surely, 2^{12211111101220} is an apocalyptic number.

12211111101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211111101220 is an abundant number, since it is smaller than the sum of its proper divisors (13604325125780).

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

12211111101220 is a wasteful number, since it uses less digits than its factorization.

12211111101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097688447 (or 4097688445 counting only the distinct ones).

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

Adding to 12211111101220 its reverse (2210111111221), we get a palindrome (14421222212441).

The spelling of 12211111101220 in words is "twelve trillion, two hundred eleven billion, one hundred eleven million, one hundred one thousand, two hundred twenty".