121203225 has 72 divisors (see below), whose sum is σ = 255108672. Its totient is φ = 54230400.

The previous prime is 121203193. The next prime is 121203347. The reversal of 121203225 is 522302121.

It is not a de Polignac number, because 121203225 - 2⁵ = 121203193 is a prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 121203198 and 121203207.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 30292 + ... + 34058.

It is an arithmetic number, because the mean of its divisors is an integer number (3543176).

Almost surely, 2^121203225 is an apocalyptic number.

121203225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121203225 is an abundant number, since it is smaller than the sum of its proper divisors (133905447).

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

121203225 is a wasteful number, since it uses less digits than its factorization.

121203225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 121203225 is about 11009.2336245535. The cubic root of 121203225 is about 494.8854954001.

Adding to 121203225 its reverse (522302121), we get a palindrome (643505346).

The spelling of 121203225 in words is "one hundred twenty-one million, two hundred three thousand, two hundred twenty-five".