101111151540 has 96 divisors (see below), whose sum is σ = 323809597440. Its totient is φ = 23092983936.

The previous prime is 101111151509. The next prime is 101111151551. The reversal of 101111151540 is 45151111101.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 445041 + ... + 632679.

It is an arithmetic number, because the mean of its divisors is an integer number (3373016640).

Almost surely, 2^101111151540 is an apocalyptic number.

101111151540 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 101111151540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161904798720).

101111151540 is an abundant number, since it is smaller than the sum of its proper divisors (222698445900).

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

101111151540 is a wasteful number, since it uses less digits than its factorization.

101111151540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188941 (or 188939 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 21.

Adding to 101111151540 its reverse (45151111101), we get a palindrome (146262262641).

The spelling of 101111151540 in words is "one hundred one billion, one hundred eleven million, one hundred fifty-one thousand, five hundred forty".