121000010210128 has 240 divisors, whose sum is σ = 288111621033216. Its totient is φ = 48988983859200.

The previous prime is 121000010210083. The next prime is 121000010210129. The reversal of 121000010210128 is 821012010000121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000010210129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 470921500 + ... + 471178372.

Almost surely, 2^{121000010210128} 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 121000010210128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144055810516608).

121000010210128 is an abundant number, since it is smaller than the sum of its proper divisors (167111610823088).

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

121000010210128 is a wasteful number, since it uses less digits than its factorization.

121000010210128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257242 (or 257229 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121000010210128 its reverse (821012010000121), we get a palindrome (942012020210249).

The spelling of 121000010210128 in words is "one hundred twenty-one trillion, ten million, two hundred ten thousand, one hundred twenty-eight".