12100705621 has 8 divisors (see below), whose sum is σ = 12813579864. Its totient is φ = 11387950080.

The previous prime is 12100705609. The next prime is 12100705657. The reversal of 12100705621 is 12650700121.

It can be written as a sum of positive squares in 4 ways, for example, as 1481403121 + 10619302500 = 38489^2 + 103050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12100705621 is a prime.

It is a super-2 number, since 2×12100705621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100715621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262461 + ... + 305101.

It is an arithmetic number, because the mean of its divisors is an integer number (1601697483).

Almost surely, 2^12100705621 is an apocalyptic number.

It is an amenable number.

12100705621 is a deficient number, since it is larger than the sum of its proper divisors (712874243).

12100705621 is a wasteful number, since it uses less digits than its factorization.

12100705621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59351.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 12100705621 in words is "twelve billion, one hundred million, seven hundred five thousand, six hundred twenty-one".