100121706 has 12 divisors (see below), whose sum is σ = 216930402. Its totient is φ = 33373896.

The previous prime is 100121701. The next prime is 100121711. The reversal of 100121706 is 607121001.

It is an interprime number because it is at equal distance from previous prime (100121701) and next prime (100121711).

It can be written as a sum of positive squares in only one way, i.e., 89132481 + 10989225 = 9441^2 + 3315^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5562317 = 100121706 / (1 + 0 + 0 + 1 + 2 + 1 + 7 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (100121701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2781141 + ... + 2781176.

Almost surely, 2^100121706 is an apocalyptic number.

100121706 is an abundant number, since it is smaller than the sum of its proper divisors (116808696).

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

100121706 is a wasteful number, since it uses less digits than its factorization.

100121706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562325 (or 5562322 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 100121706 is about 10006.0834495821. The cubic root of 100121706 is about 464.3471100910.

Adding to 100121706 its reverse (607121001), we get a palindrome (707242707).

The spelling of 100121706 in words is "one hundred million, one hundred twenty-one thousand, seven hundred six".