1010099981 has 8 divisors (see below), whose sum is σ = 1102248000. Its totient is φ = 918005440.

The previous prime is 1010099941. The next prime is 1010099989. The reversal of 1010099981 is 1899900101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1010099981 - 2¹⁴ = 1010083597 is a prime.

It is a super-2 number, since 2×1010099981² = 2040603943232400722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010099989) 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, 33200 + ... + 55878.

It is an arithmetic number, because the mean of its divisors is an integer number (137781000).

Almost surely, 2^1010099981 is an apocalyptic number.

1010099981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1010099981 is a deficient number, since it is larger than the sum of its proper divisors (92148019).

1010099981 is a wasteful number, since it uses less digits than its factorization.

1010099981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26739.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 1010099981 is about 31782.0701182286. The cubic root of 1010099981 is about 1003.3553891049.

The spelling of 1010099981 in words is "one billion, ten million, ninety-nine thousand, nine hundred eighty-one".