25121011020000 has 480 divisors, whose sum is σ = 95950592381952. Its totient is φ = 5633601792000.

The previous prime is 25121011019977. The next prime is 25121011020059. The reversal of 25121011020000 is 2011012152.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×25121011020000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 21695737 + ... + 22824263.

Almost surely, 2^{25121011020000} is an apocalyptic number.

25121011020000 is a gapful number since it is divisible by the number (20) 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 25121011020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47975296190976).

25121011020000 is an abundant number, since it is smaller than the sum of its proper divisors (70829581361952).

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

25121011020000 is a wasteful number, since it uses less digits than its factorization.

25121011020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128620 (or 1128597 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 25121011020000 its reverse (2011012152), we get a palindrome (25123022032152).

The spelling of 25121011020000 in words is "twenty-five trillion, one hundred twenty-one billion, eleven million, twenty thousand".