101051010165621 has 4 divisors (see below), whose sum is σ = 134734680220832. Its totient is φ = 67367340110412.

The previous prime is 101051010165587. The next prime is 101051010165647. The reversal of 101051010165621 is 126561010150101.

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 not a de Polignac number, because 101051010165621 - 2⁷ = 101051010165493 is a prime.

It is a super-2 number, since 2×101051010165621² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101051010165661) 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, 16841835027601 + ... + 16841835027606.

It is an arithmetic number, because the mean of its divisors is an integer number (33683670055208).

Almost surely, 2^{101051010165621} is an apocalyptic number.

It is an amenable number.

101051010165621 is a deficient number, since it is larger than the sum of its proper divisors (33683670055211).

101051010165621 is an equidigital number, since it uses as much as digits as its factorization.

101051010165621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33683670055210.

The product of its (nonzero) digits is 1800, while the sum is 30.

The spelling of 101051010165621 in words is "one hundred one trillion, fifty-one billion, ten million, one hundred sixty-five thousand, six hundred twenty-one".