201025421225 has 12 divisors (see below), whose sum is σ = 249866455440. Its totient is φ = 160436509200.

The previous prime is 201025421221. The next prime is 201025421239. The reversal of 201025421225 is 522124520102.

It is not a de Polignac number, because 201025421225 - 2² = 201025421221 is a prime.

It is a super-2 number, since 2×201025421225² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201025421194 and 201025421203.

It is not an unprimeable number, because it can be changed into a prime (201025421221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9585011 + ... + 9605960.

It is an arithmetic number, because the mean of its divisors is an integer number (20822204620).

Almost surely, 2^201025421225 is an apocalyptic number.

201025421225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201025421225 is a deficient number, since it is larger than the sum of its proper divisors (48841034215).

201025421225 is a wasteful number, since it uses less digits than its factorization.

201025421225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19191400 (or 19191395 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 201025421225 its reverse (522124520102), we get a palindrome (723149941327).

The spelling of 201025421225 in words is "two hundred one billion, twenty-five million, four hundred twenty-one thousand, two hundred twenty-five".