121023445440 has 56 divisors (see below), whose sum is σ = 384249442320. Its totient is φ = 32272918528.

The previous prime is 121023445429. The next prime is 121023445463. The reversal of 121023445440 is 44544320121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 121023445398 and 121023445407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63032085 + ... + 63034004.

Almost surely, 2^121023445440 is an apocalyptic number.

121023445440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121023445440 is an abundant number, since it is smaller than the sum of its proper divisors (263225996880).

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

121023445440 is a wasteful number, since it uses less digits than its factorization.

121023445440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126066109 (or 126066099 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 121023445440 its reverse (44544320121), we get a palindrome (165567765561).

The spelling of 121023445440 in words is "one hundred twenty-one billion, twenty-three million, four hundred forty-five thousand, four hundred forty".