423721811106101 has 4 divisors (see below), whose sum is σ = 434056489425804. Its totient is φ = 413387132786400.

The previous prime is 423721811106073. The next prime is 423721811106137. The reversal of 423721811106101 is 101601118127324.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48515264784100 + 375206546322001 = 6965290^2 + 19370249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423721811106101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423721811106401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5167339159790 + ... + 5167339159871.

It is an arithmetic number, because the mean of its divisors is an integer number (108514122356451).

Almost surely, 2^{423721811106101} is an apocalyptic number.

423721811106101 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

423721811106101 is a deficient number, since it is larger than the sum of its proper divisors (10334678319703).

423721811106101 is a wasteful number, since it uses less digits than its factorization.

423721811106101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334678319702.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 423721811106101 in words is "four hundred twenty-three trillion, seven hundred twenty-one billion, eight hundred eleven million, one hundred six thousand, one hundred one".