121435214440 has 32 divisors (see below), whose sum is σ = 273265154280. Its totient is φ = 48567699712.

The previous prime is 121435214437. The next prime is 121435214441. The reversal of 121435214440 is 44412534121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121434128676 + 1085764 = 348474^2 + 1042^2 .

It is a super-2 number, since 2×121435214440² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121435214441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114594 + ... + 505966.

Almost surely, 2^121435214440 is an apocalyptic number.

121435214440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121435214440 is an abundant number, since it is smaller than the sum of its proper divisors (151829939840).

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

121435214440 is a wasteful number, since it uses less digits than its factorization.

121435214440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399141 (or 399137 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 121435214440 its reverse (44412534121), we get a palindrome (165847748561).

The spelling of 121435214440 in words is "one hundred twenty-one billion, four hundred thirty-five million, two hundred fourteen thousand, four hundred forty".