121231314440 has 64 divisors (see below), whose sum is σ = 273618777600. Its totient is φ = 48341968128.

The previous prime is 121231314431. The next prime is 121231314461. The reversal of 121231314440 is 44413132121.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18345617 + ... + 18352223.

It is an arithmetic number, because the mean of its divisors is an integer number (4275293400).

Almost surely, 2^121231314440 is an apocalyptic number.

121231314440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231314440 is an abundant number, since it is smaller than the sum of its proper divisors (152387463160).

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

121231314440 is a wasteful number, since it uses less digits than its factorization.

121231314440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7974 (or 7970 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 121231314440 its reverse (44413132121), we get a palindrome (165644446561).

The spelling of 121231314440 in words is "one hundred twenty-one billion, two hundred thirty-one million, three hundred fourteen thousand, four hundred forty".