1220101201211 has 4 divisors (see below), whose sum is σ = 1224962162424. Its totient is φ = 1215240240000.

The previous prime is 1220101201201. The next prime is 1220101201279. The reversal of 1220101201211 is 1121021010221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220101201211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220101201201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430480230 + ... + 2430480731.

It is an arithmetic number, because the mean of its divisors is an integer number (306240540606).

Almost surely, 2^{1220101201211} is an apocalyptic number.

1220101201211 is a deficient number, since it is larger than the sum of its proper divisors (4860961213).

1220101201211 is an equidigital number, since it uses as much as digits as its factorization.

1220101201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860961212.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220101201211 its reverse (1121021010221), we get a palindrome (2341122211432).

The spelling of 1220101201211 in words is "one trillion, two hundred twenty billion, one hundred one million, two hundred one thousand, two hundred eleven".