121240122440 has 32 divisors (see below), whose sum is σ = 277937266680. Its totient is φ = 47581028352.

The previous prime is 121240122413. The next prime is 121240122457. The reversal of 121240122440 is 44221042121.

It can be written as a sum of positive squares in 4 ways, for example, as 116186903044 + 5053219396 = 340862^2 + 71086^2 .

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, 28592249 + ... + 28596488.

Almost surely, 2^121240122440 is an apocalyptic number.

121240122440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121240122440 is an abundant number, since it is smaller than the sum of its proper divisors (156697144240).

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

121240122440 is a wasteful number, since it uses less digits than its factorization.

121240122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57188801 (or 57188797 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 121240122440 its reverse (44221042121), we get a palindrome (165461164561).

The spelling of 121240122440 in words is "one hundred twenty-one billion, two hundred forty million, one hundred twenty-two thousand, four hundred forty".