1220120010001 has 8 divisors (see below), whose sum is σ = 1273624942464. Its totient is φ = 1166653097280.

The previous prime is 1220120009987. The next prime is 1220120010013. The reversal of 1220120010001 is 1000100210221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220120010001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220120010001.

It is not an unprimeable number, because it can be changed into a prime (1220120010101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9439336 + ... + 9567721.

It is an arithmetic number, because the mean of its divisors is an integer number (159203117808).

Almost surely, 2^{1220120010001} is an apocalyptic number.

It is an amenable number.

1220120010001 is a deficient number, since it is larger than the sum of its proper divisors (53504932463).

1220120010001 is a wasteful number, since it uses less digits than its factorization.

1220120010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19009871.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220120010001 its reverse (1000100210221), we get a palindrome (2220220220222).

The spelling of 1220120010001 in words is "one trillion, two hundred twenty billion, one hundred twenty million, ten thousand, one".