12210001011220 has 24 divisors (see below), whose sum is σ = 25665445449000. Its totient is φ = 4879344532992.

The previous prime is 12210001011193. The next prime is 12210001011269. The reversal of 12210001011220 is 2211010001221.

It can be written as a sum of positive squares in 4 ways, for example, as 7578061997584 + 4631939013636 = 2752828^2 + 2152194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12210001011220.

It is a congruent number.

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, 290970465 + ... + 291012424.

It is an arithmetic number, because the mean of its divisors is an integer number (1069393560375).

Almost surely, 2^{12210001011220} is an apocalyptic number.

12210001011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12210001011220 is an abundant number, since it is smaller than the sum of its proper divisors (13455444437780).

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

12210001011220 is a wasteful number, since it uses less digits than its factorization.

12210001011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581983947 (or 581983945 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12210001011220 its reverse (2211010001221), we get a palindrome (14421011012441).

The spelling of 12210001011220 in words is "twelve trillion, two hundred ten billion, one million, eleven thousand, two hundred twenty".