1021100140 has 24 divisors (see below), whose sum is σ = 2145143952. Its totient is φ = 408281280.

The previous prime is 1021100099. The next prime is 1021100141. The reversal of 1021100140 is 410011201.

1021100140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1021100141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52335 + ... + 69145.

It is an arithmetic number, because the mean of its divisors is an integer number (89380998).

Almost surely, 2^1021100140 is an apocalyptic number.

1021100140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021100140 is an abundant number, since it is smaller than the sum of its proper divisors (1124043812).

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

1021100140 is a wasteful number, since it uses less digits than its factorization.

1021100140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19857 (or 19855 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1021100140 is about 31954.6575634914. The cubic root of 1021100140 is about 1006.9844834167.

Adding to 1021100140 its reverse (410011201), we get a palindrome (1431111341).

The spelling of 1021100140 in words is "one billion, twenty-one million, one hundred thousand, one hundred forty".