1220211122001 has 16 divisors (see below), whose sum is σ = 1670957783424. Its totient is φ = 791470272384.

The previous prime is 1220211121999. The next prime is 1220211122003. The reversal of 1220211122001 is 1002211120221.

It is an interprime number because it is at equal distance from previous prime (1220211121999) and next prime (1220211122003).

It is not a de Polignac number, because 1220211122001 - 2¹ = 1220211121999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220211122003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6208821 + ... + 6402333.

It is an arithmetic number, because the mean of its divisors is an integer number (104434861464).

Almost surely, 2^{1220211122001} is an apocalyptic number.

It is an amenable number.

1220211122001 is a deficient number, since it is larger than the sum of its proper divisors (450746661423).

1220211122001 is a wasteful number, since it uses less digits than its factorization.

1220211122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250360.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220211122001 its reverse (1002211120221), we get a palindrome (2222422242222).

The spelling of 1220211122001 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty-two thousand, one".