121245031512 has 384 divisors, whose sum is σ = 390098592000. Its totient is φ = 33625912320.

The previous prime is 121245031499. The next prime is 121245031547. The reversal of 121245031512 is 215130542121.

It is a happy number.

121245031512 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 4 + 503 + 151 + 2 = 666.

It is a super-2 number, since 2×121245031512² (a number of 23 digits) contains 22 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 (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53434314 + ... + 53436582.

It is an arithmetic number, because the mean of its divisors is an integer number (1015881750).

Almost surely, 2^121245031512 is an apocalyptic number.

121245031512 is a gapful number since it is divisible by the number (12) 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 121245031512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195049296000).

121245031512 is an abundant number, since it is smaller than the sum of its proper divisors (268853560488).

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

121245031512 is a wasteful number, since it uses less digits than its factorization.

121245031512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 121245031512 its reverse (215130542121), we get a palindrome (336375573633).

The spelling of 121245031512 in words is "one hundred twenty-one billion, two hundred forty-five million, thirty-one thousand, five hundred twelve".