1021102011999 has 14 divisors (see below), whose sum is σ = 1530952674776. Its totient is φ = 680734674180.

The previous prime is 1021102011989. The next prime is 1021102012033. The reversal of 1021102011999 is 9991102011201.

It is not a de Polignac number, because 1021102011999 - 2¹¹ = 1021102009951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021102011989) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 700343587 + ... + 700345044.

It is an arithmetic number, because the mean of its divisors is an integer number (109353762484).

Almost surely, 2^{1021102011999} is an apocalyptic number.

1021102011999 is a deficient number, since it is larger than the sum of its proper divisors (509850662777).

1021102011999 is an frugal number, since it uses more digits than its factorization.

1021102011999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400688649 (or 1400688634 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 1021102011999 in words is "one trillion, twenty-one billion, one hundred two million, eleven thousand, nine hundred ninety-nine".