1013201121020 has 96 divisors (see below), whose sum is σ = 2372902511616. Its totient is φ = 360237996800.

The previous prime is 1013201120977. The next prime is 1013201121137. The reversal of 1013201121020 is 201211023101.

It is a junction number, because it is equal to n+sod(n) for n = 1013201120986 and 1013201121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10426055 + ... + 10522785.

It is an arithmetic number, because the mean of its divisors is an integer number (24717734496).

Almost surely, 2^{1013201121020} is an apocalyptic number.

1013201121020 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 1013201121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186451255808).

1013201121020 is an abundant number, since it is smaller than the sum of its proper divisors (1359701390596).

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

1013201121020 is a wasteful number, since it uses less digits than its factorization.

1013201121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97811 (or 97809 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1013201121020 its reverse (201211023101), we get a palindrome (1214412144121).

The spelling of 1013201121020 in words is "one trillion, thirteen billion, two hundred one million, one hundred twenty-one thousand, twenty".