1020111311380 has 96 divisors (see below), whose sum is σ = 2577922099200. Its totient is φ = 331241726592.

The previous prime is 1020111311339. The next prime is 1020111311381. The reversal of 1020111311380 is 831131110201.

1020111311380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020111311381) 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, 8770767 + ... + 8886313.

It is an arithmetic number, because the mean of its divisors is an integer number (26853355200).

Almost surely, 2^{1020111311380} is an apocalyptic number.

1020111311380 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 1020111311380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288961049600).

1020111311380 is an abundant number, since it is smaller than the sum of its proper divisors (1557810787820).

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

1020111311380 is a wasteful number, since it uses less digits than its factorization.

1020111311380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118901 (or 118899 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 1020111311380 its reverse (831131110201), we get a palindrome (1851242421581).

The spelling of 1020111311380 in words is "one trillion, twenty billion, one hundred eleven million, three hundred eleven thousand, three hundred eighty".