11105381321870 has 64 divisors (see below), whose sum is σ = 22399678973952. Its totient is φ = 3929089056000.

The previous prime is 11105381321861. The next prime is 11105381321893. The reversal of 11105381321870 is 7812318350111.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 1699586 + ... + 5009925.

It is an arithmetic number, because the mean of its divisors is an integer number (349994983968).

Almost surely, 2^{11105381321870} is an apocalyptic number.

11105381321870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11105381321870 is an abundant number, since it is smaller than the sum of its proper divisors (11294297652082).

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

11105381321870 is a wasteful number, since it uses less digits than its factorization.

11105381321870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709937.

The product of its (nonzero) digits is 40320, while the sum is 41.

Adding to 11105381321870 its reverse (7812318350111), we get a palindrome (18917699671981).

The spelling of 11105381321870 in words is "eleven trillion, one hundred five billion, three hundred eighty-one million, three hundred twenty-one thousand, eight hundred seventy".