121345004500 has 48 divisors (see below), whose sum is σ = 274156056720. Its totient is φ = 46864272000.

The previous prime is 121345004441. The next prime is 121345004519. The reversal of 121345004500 is 5400543121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 83523312016 + 37821692484 = 289004^2 + 194478^2 .

It is a super-2 number, since 2×121345004500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4169811 + ... + 4198810.

It is an arithmetic number, because the mean of its divisors is an integer number (5711584515).

Almost surely, 2^121345004500 is an apocalyptic number.

121345004500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121345004500 is an abundant number, since it is smaller than the sum of its proper divisors (152811052220).

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

121345004500 is a wasteful number, since it uses less digits than its factorization.

121345004500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368669 (or 8368657 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 121345004500 its reverse (5400543121), we get a palindrome (126745547621).

The spelling of 121345004500 in words is "one hundred twenty-one billion, three hundred forty-five million, four thousand, five hundred".