1220120210001 has 96 divisors (see below), whose sum is σ = 2101952443392. Its totient is φ = 622381415040.

The previous prime is 1220120209993. The next prime is 1220120210011. The reversal of 1220120210001 is 1000120210221.

It is not a de Polignac number, because 1220120210001 - 2³ = 1220120209993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220120210011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34325700 + ... + 34361226.

It is an arithmetic number, because the mean of its divisors is an integer number (21895337952).

Almost surely, 2^{1220120210001} is an apocalyptic number.

1220120210001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220120210001 is a deficient number, since it is larger than the sum of its proper divisors (881832233391).

1220120210001 is a wasteful number, since it uses less digits than its factorization.

1220120210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35939 (or 35932 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1220120210001 its reverse (1000120210221), we get a palindrome (2220240420222).

It can be divided in two parts, 12201 and 20210001, that added together give a palindrome (20222202).

The spelling of 1220120210001 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred ten thousand, one".