100355101981 has 32 divisors (see below), whose sum is σ = 109229662080. Its totient is φ = 91853346816.

The previous prime is 100355101939. The next prime is 100355102033. The reversal of 100355101981 is 189101553001.

It is a happy number.

It is not a de Polignac number, because 100355101981 - 2¹³ = 100355093789 is a prime.

It is a super-2 number, since 2×100355101981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100355101681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38113041 + ... + 38115673.

It is an arithmetic number, because the mean of its divisors is an integer number (3413426940).

Almost surely, 2^100355101981 is an apocalyptic number.

It is an amenable number.

100355101981 is a deficient number, since it is larger than the sum of its proper divisors (8874560099).

100355101981 is a wasteful number, since it uses less digits than its factorization.

100355101981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133.

The product of its (nonzero) digits is 5400, while the sum is 34.

Adding to 100355101981 its reverse (189101553001), we get a palindrome (289456654982).

The spelling of 100355101981 in words is "one hundred billion, three hundred fifty-five million, one hundred one thousand, nine hundred eighty-one".