111961100838 has 16 divisors (see below), whose sum is σ = 223939151280. Its totient is φ = 37317542016.

The previous prime is 111961100813. The next prime is 111961100897. The reversal of 111961100838 is 838001169111.

It is a junction number, because it is equal to n+sod(n) for n = 111961100796 and 111961100805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619543 + ... + 779586.

It is an arithmetic number, because the mean of its divisors is an integer number (13996196955).

Almost surely, 2^111961100838 is an apocalyptic number.

111961100838 is an abundant number, since it is smaller than the sum of its proper divisors (111978050442).

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

111961100838 is a wasteful number, since it uses less digits than its factorization.

111961100838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412471.

The product of its (nonzero) digits is 10368, while the sum is 39.

Adding to 111961100838 its reverse (838001169111), we get a palindrome (949962269949).

The spelling of 111961100838 in words is "one hundred eleven billion, nine hundred sixty-one million, one hundred thousand, eight hundred thirty-eight".