101021120 has 28 divisors (see below), whose sum is σ = 240557304. Its totient is φ = 40408320.

The previous prime is 101021117. The next prime is 101021131. The reversal of 101021120 is 21120101.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 101021098 and 101021107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157526 + ... + 158165.

Almost surely, 2^101021120 is an apocalyptic number.

101021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101021120 is an abundant number, since it is smaller than the sum of its proper divisors (139536184).

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

101021120 is an equidigital number, since it uses as much as digits as its factorization.

101021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315708 (or 315698 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 101021120 is about 10050.9263254687. The cubic root of 101021120 is about 465.7334092576.

Adding to 101021120 its reverse (21120101), we get a palindrome (122141221).

The spelling of 101021120 in words is "one hundred one million, twenty-one thousand, one hundred twenty".