121040217252 has 36 divisors (see below), whose sum is σ = 311735658780. Its totient is φ = 39585479232.

The previous prime is 121040217223. The next prime is 121040217253. The reversal of 121040217252 is 252712040121.

It is a happy number.

121040217252 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 402 + 1 + 7 + 252 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110493748836 + 10546468416 = 332406^2 + 102696^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×121040217252² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121040217253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31717227 + ... + 31721042.

It is an arithmetic number, because the mean of its divisors is an integer number (8659323855).

Almost surely, 2^121040217252 is an apocalyptic number.

121040217252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121040217252 is an abundant number, since it is smaller than the sum of its proper divisors (190695441528).

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

121040217252 is a wasteful number, since it uses less digits than its factorization.

121040217252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63438332 (or 63438327 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

Adding to 121040217252 its reverse (252712040121), we get a palindrome (373752257373).

The spelling of 121040217252 in words is "one hundred twenty-one billion, forty million, two hundred seventeen thousand, two hundred fifty-two".