1220211012001 has 4 divisors (see below), whose sum is σ = 1291988130372. Its totient is φ = 1148433893632.

The previous prime is 1220211011977. The next prime is 1220211012017. The reversal of 1220211012001 is 1002101120221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 338863694400 + 881347317601 = 582120^2 + 938801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220211012001 - 2¹⁷ = 1220210880929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220211012401) 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, 35888559160 + ... + 35888559193.

It is an arithmetic number, because the mean of its divisors is an integer number (322997032593).

Almost surely, 2^{1220211012001} is an apocalyptic number.

It is an amenable number.

1220211012001 is a deficient number, since it is larger than the sum of its proper divisors (71777118371).

1220211012001 is an equidigital number, since it uses as much as digits as its factorization.

1220211012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71777118370.

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

Adding to 1220211012001 its reverse (1002101120221), we get a palindrome (2222312132222).

The spelling of 1220211012001 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twelve thousand, one".