121000111110252 has 96 divisors (see below), whose sum is σ = 343942248384000. Its totient is φ = 36482445489600.

The previous prime is 121000111110251. The next prime is 121000111110259. The reversal of 121000111110252 is 252011111000121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121000111110251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255672999 + ... + 256145822.

It is an arithmetic number, because the mean of its divisors is an integer number (3582731754000).

Almost surely, 2^{121000111110252} is an apocalyptic number.

121000111110252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121000111110252 is an abundant number, since it is smaller than the sum of its proper divisors (222942137273748).

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

121000111110252 is a wasteful number, since it uses less digits than its factorization.

121000111110252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511819044 (or 511819036 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 18.

Adding to 121000111110252 its reverse (252011111000121), we get a palindrome (373011222110373).

The spelling of 121000111110252 in words is "one hundred twenty-one trillion, one hundred eleven million, one hundred ten thousand, two hundred fifty-two".