121103315250645 has 72 divisors (see below), whose sum is σ = 244072683526176. Its totient is φ = 51102937372032.

The previous prime is 121103315250607. The next prime is 121103315250683. The reversal of 121103315250645 is 546052513301121.

It is an interprime number because it is at equal distance from previous prime (121103315250607) and next prime (121103315250683).

It is not a de Polignac number, because 121103315250645 - 2¹² = 121103315246549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 487350387 + ... + 487598816.

It is an arithmetic number, because the mean of its divisors is an integer number (3389898382308).

Almost surely, 2^{121103315250645} is an apocalyptic number.

121103315250645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121103315250645 is an abundant number, since it is smaller than the sum of its proper divisors (122969368275531).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121103315250645 is a wasteful number, since it uses less digits than its factorization.

121103315250645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974949251 (or 974949231 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

Adding to 121103315250645 its reverse (546052513301121), we get a palindrome (667155828551766).

The spelling of 121103315250645 in words is "one hundred twenty-one trillion, one hundred three billion, three hundred fifteen million, two hundred fifty thousand, six hundred forty-five".