1010011200021 has 32 divisors (see below), whose sum is σ = 1516096051200. Its totient is φ = 664447857840.

The previous prime is 1010011200019. The next prime is 1010011200067. The reversal of 1010011200021 is 1200021100101.

It is a happy number.

It is not a de Polignac number, because 1010011200021 - 2¹ = 1010011200019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1010011199976 and 1010011200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010011200001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3732130 + ... + 3993596.

It is an arithmetic number, because the mean of its divisors is an integer number (47378001600).

Almost surely, 2^{1010011200021} is an apocalyptic number.

It is an amenable number.

1010011200021 is a deficient number, since it is larger than the sum of its proper divisors (506084851179).

1010011200021 is a wasteful number, since it uses less digits than its factorization.

1010011200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263366 (or 263360 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1010011200021 its reverse (1200021100101), we get a palindrome (2210032300122).

The spelling of 1010011200021 in words is "one trillion, ten billion, eleven million, two hundred thousand, twenty-one".