10240121550 has 24 divisors (see below), whose sum is σ = 25395501816. Its totient is φ = 2730699040.

The previous prime is 10240121537. The next prime is 10240121587. The reversal of 10240121550 is 5512104201.

It is a super-3 number, since 3×10240121550³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34133589 + ... + 34133888.

It is an arithmetic number, because the mean of its divisors is an integer number (1058145909).

Almost surely, 2^10240121550 is an apocalyptic number.

10240121550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10240121550 is an abundant number, since it is smaller than the sum of its proper divisors (15155380266).

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

10240121550 is a wasteful number, since it uses less digits than its factorization.

10240121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68267492 (or 68267487 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 10240121550 its reverse (5512104201), we get a palindrome (15752225751).

The spelling of 10240121550 in words is "ten billion, two hundred forty million, one hundred twenty-one thousand, five hundred fifty".