121254034344520 has 576 divisors, whose sum is σ = 375604695648000. Its totient is φ = 34813420830720.

The previous prime is 121254034344511. The next prime is 121254034344533. The reversal of 121254034344520 is 25443430452121.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 292642456 + ... + 293056504.

It is an arithmetic number, because the mean of its divisors is an integer number (652091485500).

Almost surely, 2^{121254034344520} is an apocalyptic number.

121254034344520 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 121254034344520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187802347824000).

121254034344520 is an abundant number, since it is smaller than the sum of its proper divisors (254350661303480).

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

121254034344520 is a wasteful number, since it uses less digits than its factorization.

121254034344520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414166 (or 414138 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 121254034344520 its reverse (25443430452121), we get a palindrome (146697464796641).

The spelling of 121254034344520 in words is "one hundred twenty-one trillion, two hundred fifty-four billion, thirty-four million, three hundred forty-four thousand, five hundred twenty".