61021107 has 20 divisors (see below), whose sum is σ = 104178096. Its totient is φ = 34868880.

The previous prime is 61021099. The next prime is 61021111. The reversal of 61021107 is 70112016.

It is not a de Polignac number, because 61021107 - 2³ = 61021099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61021107.

It is not an unprimeable number, because it can be changed into a prime (61021127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53244 + ... + 54377.

Almost surely, 2^61021107 is an apocalyptic number.

61021107 is a deficient number, since it is larger than the sum of its proper divisors (43156989).

61021107 is a wasteful number, since it uses less digits than its factorization.

61021107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107640 (or 107631 counting only the distinct ones).

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

The square root of 61021107 is about 7811.6007962517. The cubic root of 61021107 is about 393.6951161598.

Subtracting 61021107 from its reverse (70112016), we obtain a palindrome (9090909).

The spelling of 61021107 in words is "sixty-one million, twenty-one thousand, one hundred seven".