121010420124 has 288 divisors, whose sum is σ = 353023646976. Its totient is φ = 35938183680.

The previous prime is 121010420123. The next prime is 121010420143. The reversal of 121010420124 is 421024010121.

121010420124 is a `hidden beast` number, since 1 + 210 + 10 + 420 + 1 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121010420097 and 121010420106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010420123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 153761259 + ... + 153762045.

It is an arithmetic number, because the mean of its divisors is an integer number (1225776552).

Almost surely, 2^121010420124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121010420124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176511823488).

121010420124 is an abundant number, since it is smaller than the sum of its proper divisors (232013226852).

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

121010420124 is a wasteful number, since it uses less digits than its factorization.

121010420124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121010420124 its reverse (421024010121), we get a palindrome (542034430245).

The spelling of 121010420124 in words is "one hundred twenty-one billion, ten million, four hundred twenty thousand, one hundred twenty-four".