1220012221211 has 8 divisors (see below), whose sum is σ = 1394359108320. Its totient is φ = 1045680190848.

The previous prime is 1220012221193. The next prime is 1220012221291. The reversal of 1220012221211 is 1121222100221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220012221211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220012221211.

It is not an unprimeable number, because it can be changed into a prime (1220012221291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3537656 + ... + 3867173.

It is an arithmetic number, because the mean of its divisors is an integer number (174294888540).

Almost surely, 2^{1220012221211} is an apocalyptic number.

1220012221211 is a deficient number, since it is larger than the sum of its proper divisors (174346887109).

1220012221211 is an equidigital number, since it uses as much as digits as its factorization.

1220012221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428373.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1220012221211 its reverse (1121222100221), we get a palindrome (2341234321432).

The spelling of 1220012221211 in words is "one trillion, two hundred twenty billion, twelve million, two hundred twenty-one thousand, two hundred eleven".