2001012021103 has 2 divisors, whose sum is σ = 2001012021104. Its totient is φ = 2001012021102.

The previous prime is 2001012020999. The next prime is 2001012021163. The reversal of 2001012021103 is 3011202101002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001012021103 - 2¹³ = 2001012012911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001012021163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000506010551 + 1000506010552.

It is an arithmetic number, because the mean of its divisors is an integer number (1000506010552).

Almost surely, 2^{2001012021103} is an apocalyptic number.

2001012021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001012021103 is an equidigital number, since it uses as much as digits as its factorization.

2001012021103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2001012021103 its reverse (3011202101002), we get a palindrome (5012214122105).

The spelling of 2001012021103 in words is "two trillion, one billion, twelve million, twenty-one thousand, one hundred three".