1042220113400 has 96 divisors (see below), whose sum is σ = 2513444709600. Its totient is φ = 401432640000.

The previous prime is 1042220113397. The next prime is 1042220113409. The reversal of 1042220113400 is 43110222401.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042220113409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1922525 + ... + 2404275.

It is an arithmetic number, because the mean of its divisors is an integer number (26181715725).

Almost surely, 2^{1042220113400} is an apocalyptic number.

1042220113400 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 1042220113400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256722354800).

1042220113400 is an abundant number, since it is smaller than the sum of its proper divisors (1471224596200).

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

1042220113400 is a wasteful number, since it uses less digits than its factorization.

1042220113400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482169 (or 482160 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1042220113400 its reverse (43110222401), we get a palindrome (1085330335801).

The spelling of 1042220113400 in words is "one trillion, forty-two billion, two hundred twenty million, one hundred thirteen thousand, four hundred".