1221212002103 has 2 divisors, whose sum is σ = 1221212002104. Its totient is φ = 1221212002102.

The previous prime is 1221212002099. The next prime is 1221212002133. The reversal of 1221212002103 is 3012002121221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221212002103 - 2² = 1221212002099 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221212002133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610606001051 + 610606001052.

It is an arithmetic number, because the mean of its divisors is an integer number (610606001052).

Almost surely, 2^{1221212002103} is an apocalyptic number.

1221212002103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221212002103 is an equidigital number, since it uses as much as digits as its factorization.

1221212002103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221212002103 its reverse (3012002121221), we get a palindrome (4233214123324).

The spelling of 1221212002103 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two thousand, one hundred three".