1101202128 has 120 divisors (see below), whose sum is σ = 3441981088. Its totient is φ = 338815872.

The previous prime is 1101202111. The next prime is 1101202139. The reversal of 1101202128 is 8212021011.

It is a super-2 number, since 2×1101202128² = 2425292253423456768, which contains 22 as substring.

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 1101202128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39651 + ... + 61437.

Almost surely, 2^1101202128 is an apocalyptic number.

1101202128 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 1101202128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720990544).

1101202128 is an abundant number, since it is smaller than the sum of its proper divisors (2340778960).

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

1101202128 is a wasteful number, since it uses less digits than its factorization.

1101202128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21823 (or 21805 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1101202128 is about 33184.3657164033. The cubic root of 1101202128 is about 1032.6560188068.

Adding to 1101202128 its reverse (8212021011), we get a palindrome (9313223139).

It can be divided in two parts, 110120212 and 8, that added together give a triangular number (110120220 = T₁₄₈₄₀).

The spelling of 1101202128 in words is "one billion, one hundred one million, two hundred two thousand, one hundred twenty-eight".