101233720120661 has 4 divisors (see below), whose sum is σ = 101233829836512. Its totient is φ = 101233610404812.

The previous prime is 101233720120633. The next prime is 101233720120699. The reversal of 101233720120661 is 166021027332101.

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 101233720120661 - 2¹⁴ = 101233720104277 is a prime.

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 (101233720120261) 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, 53462051 + ... + 55323216.

It is an arithmetic number, because the mean of its divisors is an integer number (25308457459128).

Almost surely, 2^{101233720120661} is an apocalyptic number.

It is an amenable number.

101233720120661 is a deficient number, since it is larger than the sum of its proper divisors (109715851).

101233720120661 is an equidigital number, since it uses as much as digits as its factorization.

101233720120661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109715850.

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 101233720120661 its reverse (166021027332101), we get a palindrome (267254747452762).

The spelling of 101233720120661 in words is "one hundred one trillion, two hundred thirty-three billion, seven hundred twenty million, one hundred twenty thousand, six hundred sixty-one".