10121555135320 has 64 divisors (see below), whose sum is σ = 23070937219200. Its totient is φ = 3995784898560.

The previous prime is 10121555135303. The next prime is 10121555135443. The reversal of 10121555135320 is 2353155512101.

It is a happy number.

10121555135320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7331092 + ... + 8601628.

It is an arithmetic number, because the mean of its divisors is an integer number (360483394050).

Almost surely, 2^{10121555135320} is an apocalyptic number.

10121555135320 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 10121555135320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11535468609600).

10121555135320 is an abundant number, since it is smaller than the sum of its proper divisors (12949382083880).

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

10121555135320 is a wasteful number, since it uses less digits than its factorization.

10121555135320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273148 (or 1273144 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 10121555135320 in words is "ten trillion, one hundred twenty-one billion, five hundred fifty-five million, one hundred thirty-five thousand, three hundred twenty".