121435212440 has 16 divisors (see below), whose sum is σ = 273229228080. Its totient is φ = 48574084960.

The previous prime is 121435212433. The next prime is 121435212443. The reversal of 121435212440 is 44212534121.

It is a happy number.

It is a super-3 number, since 3×121435212440³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121435212443) 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, 1517940116 + ... + 1517940195.

It is an arithmetic number, because the mean of its divisors is an integer number (17076826755).

Almost surely, 2^121435212440 is an apocalyptic number.

121435212440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121435212440 is an abundant number, since it is smaller than the sum of its proper divisors (151794015640).

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

121435212440 is a wasteful number, since it uses less digits than its factorization.

121435212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035880322 (or 3035880318 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 121435212440 its reverse (44212534121), we get a palindrome (165647746561).

The spelling of 121435212440 in words is "one hundred twenty-one billion, four hundred thirty-five million, two hundred twelve thousand, four hundred forty".