1220120200001 has 2 divisors, whose sum is σ = 1220120200002. Its totient is φ = 1220120200000.

The previous prime is 1220120199943. The next prime is 1220120200003. The reversal of 1220120200001 is 1000020210221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1154386931776 + 65733268225 = 1074424^2 + 256385^2 .

It is an emirp because it is prime and its reverse (1000020210221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220120200001 - 2¹⁸ = 1220119937857 is a prime.

Together with 1220120200003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1220120200003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060100000 + 610060100001.

It is an arithmetic number, because the mean of its divisors is an integer number (610060100001).

Almost surely, 2^{1220120200001} is an apocalyptic number.

It is an amenable number.

1220120200001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120200001 is an equidigital number, since it uses as much as digits as its factorization.

1220120200001 is an evil number, because the sum of its binary digits is even.

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

Adding to 1220120200001 its reverse (1000020210221), we get a palindrome (2220140410222).

The spelling of 1220120200001 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred thousand, one".