1220211021201 has 4 divisors (see below), whose sum is σ = 1626948028272. Its totient is φ = 813474014132.

The previous prime is 1220211021193. The next prime is 1220211021209. The reversal of 1220211021201 is 1021201120221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1220211021193) and next prime (1220211021209).

It is a cyclic number.

It is not a de Polignac number, because 1220211021201 - 2³ = 1220211021193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220211021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203368503531 + ... + 203368503536.

It is an arithmetic number, because the mean of its divisors is an integer number (406737007068).

Almost surely, 2^{1220211021201} is an apocalyptic number.

It is an amenable number.

1220211021201 is a deficient number, since it is larger than the sum of its proper divisors (406737007071).

1220211021201 is an equidigital number, since it uses as much as digits as its factorization.

1220211021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406737007070.

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

Adding to 1220211021201 its reverse (1021201120221), we get a palindrome (2241412141422).

The spelling of 1220211021201 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twenty-one thousand, two hundred one".