121205253252 has 12 divisors (see below), whose sum is σ = 282812257616. Its totient is φ = 40401751080.

The previous prime is 121205253229. The next prime is 121205253259. The reversal of 121205253252 is 252352502121.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (121205253259) 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, 5050218874 + ... + 5050218897.

Almost surely, 2^121205253252 is an apocalyptic number.

121205253252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121205253252 is an abundant number, since it is smaller than the sum of its proper divisors (161607004364).

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

121205253252 is a wasteful number, since it uses less digits than its factorization.

121205253252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100437778 (or 10100437776 counting only the distinct ones).

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

Adding to 121205253252 its reverse (252352502121), we get a palindrome (373557755373).

The spelling of 121205253252 in words is "one hundred twenty-one billion, two hundred five million, two hundred fifty-three thousand, two hundred fifty-two".