25221451012000 has 48 divisors (see below), whose sum is σ = 61969105146312. Its totient is φ = 10088580403200.

The previous prime is 25221451011983. The next prime is 25221451012001. The reversal of 25221451012000 is 21015412252.

It can be written as a sum of positive squares in 4 ways, for example, as 3621302432784 + 21600148579216 = 1902972^2 + 4647596^2 .

It is a super-2 number, since 2×25221451012000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (25221451012001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3152677377 + ... + 3152685376.

Almost surely, 2^{25221451012000} is an apocalyptic number.

25221451012000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25221451012000 is an abundant number, since it is smaller than the sum of its proper divisors (36747654134312).

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

25221451012000 is an equidigital number, since it uses as much as digits as its factorization.

25221451012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305362778 (or 6305362760 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 25221451012000 its reverse (21015412252), we get a palindrome (25242466424252).

The spelling of 25221451012000 in words is "twenty-five trillion, two hundred twenty-one billion, four hundred fifty-one million, twelve thousand".