1002111010920 has 192 divisors, whose sum is σ = 3342617928000. Its totient is φ = 260282778624.

The previous prime is 1002111010913. The next prime is 1002111010921. The reversal of 1002111010920 is 290101112001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1002111010893 and 1002111010902.

It is not an unprimeable number, because it can be changed into a prime (1002111010921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1913271 + ... + 2380089.

It is an arithmetic number, because the mean of its divisors is an integer number (17409468375).

Almost surely, 2^{1002111010920} is an apocalyptic number.

1002111010920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002111010920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1671308964000).

1002111010920 is an abundant number, since it is smaller than the sum of its proper divisors (2340506917080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002111010920 is a wasteful number, since it uses less digits than its factorization.

1002111010920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466992 (or 466985 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1002111010920 its reverse (290101112001), we get a palindrome (1292212122921).

The spelling of 1002111010920 in words is "one trillion, two billion, one hundred eleven million, ten thousand, nine hundred twenty".