2001012020999 has 2 divisors, whose sum is σ = 2001012021000. Its totient is φ = 2001012020998.

The previous prime is 2001012020951. The next prime is 2001012021103. The reversal of 2001012020999 is 9990202101002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001012020999 - 2¹² = 2001012016903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001012020929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000506010499 + 1000506010500.

It is an arithmetic number, because the mean of its divisors is an integer number (1000506010500).

Almost surely, 2^{2001012020999} is an apocalyptic number.

2001012020999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001012020999 is an equidigital number, since it uses as much as digits as its factorization.

2001012020999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 2001012020999 in words is "two trillion, one billion, twelve million, twenty thousand, nine hundred ninety-nine".