1212202022201 has 2 divisors, whose sum is σ = 1212202022202. Its totient is φ = 1212202022200.

The previous prime is 1212202022197. The next prime is 1212202022267. The reversal of 1212202022201 is 1022202022121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783800355625 + 428401666576 = 885325^2 + 654524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212202022201 - 2² = 1212202022197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212202022201.

It is not a weakly prime, because it can be changed into another prime (1212202022281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606101011100 + 606101011101.

It is an arithmetic number, because the mean of its divisors is an integer number (606101011101).

Almost surely, 2^{1212202022201} is an apocalyptic number.

It is an amenable number.

1212202022201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212202022201 is an equidigital number, since it uses as much as digits as its factorization.

1212202022201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1212202022201 its reverse (1022202022121), we get a palindrome (2234404044322).

The spelling of 1212202022201 in words is "one trillion, two hundred twelve billion, two hundred two million, twenty-two thousand, two hundred one".