1212221210203 has 2 divisors, whose sum is σ = 1212221210204. Its totient is φ = 1212221210202.

The previous prime is 1212221210201. The next prime is 1212221210231. The reversal of 1212221210203 is 3020121222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212221210203 - 2¹ = 1212221210201 is a prime.

It is a super-2 number, since 2×1212221210203² (a number of 25 digits) contains 22 as substring.

Together with 1212221210201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212221210201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606110605101 + 606110605102.

It is an arithmetic number, because the mean of its divisors is an integer number (606110605102).

Almost surely, 2^{1212221210203} is an apocalyptic number.

1212221210203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212221210203 is an equidigital number, since it uses as much as digits as its factorization.

1212221210203 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 19.

Adding to 1212221210203 its reverse (3020121222121), we get a palindrome (4232342432324).

The spelling of 1212221210203 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred ten thousand, two hundred three".