1220200120001 has 4 divisors (see below), whose sum is σ = 1236915190212. Its totient is φ = 1203485049792.

The previous prime is 1220200119989. The next prime is 1220200120039. The reversal of 1220200120001 is 1000210020221.

It is a happy number.

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 438171183025 + 782028936976 = 661945^2 + 884324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220200120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220200120201) 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, 8357534996 + ... + 8357535141.

It is an arithmetic number, because the mean of its divisors is an integer number (309228797553).

Almost surely, 2^{1220200120001} is an apocalyptic number.

It is an amenable number.

1220200120001 is a deficient number, since it is larger than the sum of its proper divisors (16715070211).

1220200120001 is an equidigital number, since it uses as much as digits as its factorization.

1220200120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16715070210.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220200120001 its reverse (1000210020221), we get a palindrome (2220410140222).

The spelling of 1220200120001 in words is "one trillion, two hundred twenty billion, two hundred million, one hundred twenty thousand, one".