1212122120201 has 24 divisors (see below), whose sum is σ = 1233057745920. Its totient is φ = 1191457602720.

The previous prime is 1212122120189. The next prime is 1212122120203. The reversal of 1212122120201 is 1020212212121.

It is not a de Polignac number, because 1212122120201 - 2¹⁴ = 1212122103817 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 1212122120201.

It is not an unprimeable number, because it can be changed into a prime (1212122120203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1839335210 + ... + 1839335868.

It is an arithmetic number, because the mean of its divisors is an integer number (51377406080).

Almost surely, 2^{1212122120201} is an apocalyptic number.

It is an amenable number.

1212122120201 is a deficient number, since it is larger than the sum of its proper divisors (20935625719).

1212122120201 is an equidigital number, since it uses as much as digits as its factorization.

1212122120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212122120201 its reverse (1020212212121), we get a palindrome (2232334332322).

The spelling of 1212122120201 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty thousand, two hundred one".