121500210445 has 8 divisors (see below), whose sum is σ = 146124977400. Its totient is φ = 96983685120.

The previous prime is 121500210421. The next prime is 121500210473. The reversal of 121500210445 is 544012005121.

It can be written as a sum of positive squares in 4 ways, for example, as 56363982921 + 65136227524 = 237411^2 + 255218^2 .

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

It is not a de Polignac number, because 121500210445 - 2⁷ = 121500210317 is a prime.

It is a super-2 number, since 2×121500210445² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27057936 + ... + 27062425.

It is an arithmetic number, because the mean of its divisors is an integer number (18265622175).

Almost surely, 2^121500210445 is an apocalyptic number.

It is an amenable number.

121500210445 is a deficient number, since it is larger than the sum of its proper divisors (24624766955).

121500210445 is an equidigital number, since it uses as much as digits as its factorization.

121500210445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54120815.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 121500210445 its reverse (544012005121), we get a palindrome (665512215566).

The spelling of 121500210445 in words is "one hundred twenty-one billion, five hundred million, two hundred ten thousand, four hundred forty-five".