1011201021999 has 36 divisors (see below), whose sum is σ = 1788518829240. Its totient is φ = 547417090080.

The previous prime is 1011201021979. The next prime is 1011201022009. The reversal of 1011201021999 is 9991201021101.

1011201021999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011201021999 - 2⁹ = 1011201021487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011201021949) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60333012 + ... + 60349769.

It is an arithmetic number, because the mean of its divisors is an integer number (49681078590).

Almost surely, 2^{1011201021999} is an apocalyptic number.

1011201021999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1011201021999 is a deficient number, since it is larger than the sum of its proper divisors (777317807241).

1011201021999 is a wasteful number, since it uses less digits than its factorization.

1011201021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120682820 (or 120682810 counting only the distinct ones).

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

The spelling of 1011201021999 in words is "one trillion, eleven billion, two hundred one million, twenty-one thousand, nine hundred ninety-nine".