121225538 has 32 divisors (see below), whose sum is σ = 220765824. Its totient is φ = 48736512.

The previous prime is 121225523. The next prime is 121225547. The reversal of 121225538 is 835522121.

It is a self number, because there is not a number n which added to its sum of digits gives 121225538.

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, 93845 + ... + 95127.

It is an arithmetic number, because the mean of its divisors is an integer number (6898932).

Almost surely, 2^121225538 is an apocalyptic number.

121225538 is a deficient number, since it is larger than the sum of its proper divisors (99540286).

121225538 is a wasteful number, since it uses less digits than its factorization.

121225538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its digits is 4800, while the sum is 29.

The square root of 121225538 is about 11010.2469545419. The cubic root of 121225538 is about 494.9158623107.

Adding to 121225538 its reverse (835522121), we get a palindrome (956747659).

The spelling of 121225538 in words is "one hundred twenty-one million, two hundred twenty-five thousand, five hundred thirty-eight".