1001021020110 has 24 divisors (see below), whose sum is σ = 2602654652520. Its totient is φ = 266938938672.

The previous prime is 1001021020099. The next prime is 1001021020117. The reversal of 1001021020110 is 110201201001.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1001021020092 and 1001021020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001021020117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5561227800 + ... + 5561227979.

It is an arithmetic number, because the mean of its divisors is an integer number (108443943855).

Almost surely, 2^{1001021020110} is an apocalyptic number.

1001021020110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001021020110 is an abundant number, since it is smaller than the sum of its proper divisors (1601633632410).

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

1001021020110 is a wasteful number, since it uses less digits than its factorization.

1001021020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122455792 (or 11122455789 counting only the distinct ones).

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

Adding to 1001021020110 its reverse (110201201001), we get a palindrome (1111222221111).

The spelling of 1001021020110 in words is "one trillion, one billion, twenty-one million, twenty thousand, one hundred ten".