100131221110106 has 4 divisors (see below), whose sum is σ = 150196831665162. Its totient is φ = 50065610555052.

The previous prime is 100131221110103. The next prime is 100131221110121. The reversal of 100131221110106 is 601011122131001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63242494825225 + 36888726284881 = 7952515^2 + 6073609^2 .

It is a super-2 number, since 2×100131221110106² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100131221110103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25032805277525 + ... + 25032805277528.

Almost surely, 2^{100131221110106} is an apocalyptic number.

100131221110106 is a deficient number, since it is larger than the sum of its proper divisors (50065610555056).

100131221110106 is an equidigital number, since it uses as much as digits as its factorization.

100131221110106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50065610555055.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 100131221110106 its reverse (601011122131001), we get a palindrome (701142343241107).

The spelling of 100131221110106 in words is "one hundred trillion, one hundred thirty-one billion, two hundred twenty-one million, one hundred ten thousand, one hundred six".