1221212011003 has 2 divisors, whose sum is σ = 1221212011004. Its totient is φ = 1221212011002.

The previous prime is 1221212010983. The next prime is 1221212011027. The reversal of 1221212011003 is 3001102121221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221212011003 - 2¹³ = 1221212002811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221212011303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610606005501 + 610606005502.

It is an arithmetic number, because the mean of its divisors is an integer number (610606005502).

Almost surely, 2^{1221212011003} is an apocalyptic number.

1221212011003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221212011003 is an equidigital number, since it uses as much as digits as its factorization.

1221212011003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221212011003 its reverse (3001102121221), we get a palindrome (4222314132224).

The spelling of 1221212011003 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, eleven thousand, three".