121031342040 has 256 divisors, whose sum is σ = 429217873920. Its totient is φ = 26717713920.

The previous prime is 121031341933. The next prime is 121031342051. The reversal of 121031342040 is 40243130121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 121031341998 and 121031342016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13614477 + ... + 13623363.

It is an arithmetic number, because the mean of its divisors is an integer number (1676632320).

Almost surely, 2^121031342040 is an apocalyptic number.

121031342040 is a gapful number since it is divisible by the number (10) 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 121031342040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214608936960).

121031342040 is an abundant number, since it is smaller than the sum of its proper divisors (308186531880).

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

121031342040 is a wasteful number, since it uses less digits than its factorization.

121031342040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9462 (or 9458 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 121031342040 its reverse (40243130121), we get a palindrome (161274472161).

The spelling of 121031342040 in words is "one hundred twenty-one billion, thirty-one million, three hundred forty-two thousand, forty".