101011210128 has 120 divisors (see below), whose sum is σ = 285004824000. Its totient is φ = 33395611392.

The previous prime is 101011210121. The next prime is 101011210129. The reversal of 101011210128 is 821012110101.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 101011210128.

It is not an unprimeable number, because it can be changed into a prime (101011210121) 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, 13538463 + ... + 13545921.

It is an arithmetic number, because the mean of its divisors is an integer number (2375040200).

Almost surely, 2^101011210128 is an apocalyptic number.

101011210128 is a gapful number since it is divisible by the number (18) 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 101011210128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142502412000).

101011210128 is an abundant number, since it is smaller than the sum of its proper divisors (183993613872).

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

101011210128 is a wasteful number, since it uses less digits than its factorization.

101011210128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8229 (or 8220 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 101011210128 its reverse (821012110101), we get a palindrome (922023320229).

The spelling of 101011210128 in words is "one hundred one billion, eleven million, two hundred ten thousand, one hundred twenty-eight".