121042037536 has 144 divisors (see below), whose sum is σ = 286541805312. Its totient is φ = 50133081600.

The previous prime is 121042037531. The next prime is 121042037563. The reversal of 121042037536 is 635730240121.

It is not an unprimeable number, because it can be changed into a prime (121042037531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51571915 + ... + 51574261.

It is an arithmetic number, because the mean of its divisors is an integer number (1989873648).

Almost surely, 2^121042037536 is an apocalyptic number.

121042037536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121042037536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143270902656).

121042037536 is an abundant number, since it is smaller than the sum of its proper divisors (165499767776).

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

121042037536 is a wasteful number, since it uses less digits than its factorization.

121042037536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463 (or 3448 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 121042037536 its reverse (635730240121), we get a palindrome (756772277657).

The spelling of 121042037536 in words is "one hundred twenty-one billion, forty-two million, thirty-seven thousand, five hundred thirty-six".