1211210120803 has 2 divisors, whose sum is σ = 1211210120804. Its totient is φ = 1211210120802.

The previous prime is 1211210120779. The next prime is 1211210120831. The reversal of 1211210120803 is 3080210121121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211210120803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211210120833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605060401 + 605605060402.

It is an arithmetic number, because the mean of its divisors is an integer number (605605060402).

Almost surely, 2^{1211210120803} is an apocalyptic number.

1211210120803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211210120803 is an equidigital number, since it uses as much as digits as its factorization.

1211210120803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 1211210120803 its reverse (3080210121121), we get a palindrome (4291420241924).

The spelling of 1211210120803 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred twenty thousand, eight hundred three".