1020131100 has 54 divisors (see below), whose sum is σ = 3197547080. Its totient is φ = 272034720.

The previous prime is 1020131051. The next prime is 1020131251. The reversal of 1020131100 is 11310201.

It is a super-2 number, since 2×1020131100² = 2081334922374420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 565840 + ... + 567639.

Almost surely, 2^1020131100 is an apocalyptic number.

1020131100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020131100 is an abundant number, since it is smaller than the sum of its proper divisors (2177415980).

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

1020131100 is a wasteful number, since it uses less digits than its factorization.

1020131100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133499 (or 1133489 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1020131100 is about 31939.4912295108. The cubic root of 1020131100 is about 1006.6658345875.

Adding to 1020131100 its reverse (11310201), we get a palindrome (1031441301).

The spelling of 1020131100 in words is "one billion, twenty million, one hundred thirty-one thousand, one hundred".