121502253450 has 24 divisors (see below), whose sum is σ = 301325588928. Its totient is φ = 32400600880.

The previous prime is 121502253449. The next prime is 121502253503. The reversal of 121502253450 is 54352205121.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405007362 + ... + 405007661.

It is an arithmetic number, because the mean of its divisors is an integer number (12555232872).

Almost surely, 2^121502253450 is an apocalyptic number.

121502253450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121502253450 is an abundant number, since it is smaller than the sum of its proper divisors (179823335478).

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

121502253450 is a wasteful number, since it uses less digits than its factorization.

121502253450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810015038 (or 810015033 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 121502253450 its reverse (54352205121), we get a palindrome (175854458571).

The spelling of 121502253450 in words is "one hundred twenty-one billion, five hundred two million, two hundred fifty-three thousand, four hundred fifty".