106681057621 has 4 divisors (see below), whose sum is σ = 108489211200. Its totient is φ = 104872904044.

The previous prime is 106681057583. The next prime is 106681057631. The reversal of 106681057621 is 126750186601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 106681057621 - 2⁷ = 106681057493 is a prime.

It is a super-2 number, since 2×106681057621² (a number of 23 digits) 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 (106681057631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904076701 + ... + 904076818.

It is an arithmetic number, because the mean of its divisors is an integer number (27122302800).

Almost surely, 2^106681057621 is an apocalyptic number.

It is an amenable number.

106681057621 is a deficient number, since it is larger than the sum of its proper divisors (1808153579).

106681057621 is an equidigital number, since it uses as much as digits as its factorization.

106681057621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808153578.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 106681057621 in words is "one hundred six billion, six hundred eighty-one million, fifty-seven thousand, six hundred twenty-one".