121203261 has 24 divisors (see below), whose sum is σ = 192304320. Its totient is φ = 73218816.

The previous prime is 121203193. The next prime is 121203347. The reversal of 121203261 is 162302121.

It is not a de Polignac number, because 121203261 - 2¹³ = 121195069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121203161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11476 + ... + 19341.

It is an arithmetic number, because the mean of its divisors is an integer number (8012680).

Almost surely, 2^121203261 is an apocalyptic number.

It is an amenable number.

121203261 is a deficient number, since it is larger than the sum of its proper divisors (71101059).

121203261 is a wasteful number, since it uses less digits than its factorization.

121203261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30865 (or 30862 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 121203261 is about 11009.2352595446. The cubic root of 121203261 is about 494.8855443973.

Adding to 121203261 its reverse (162302121), we get a palindrome (283505382).

The spelling of 121203261 in words is "one hundred twenty-one million, two hundred three thousand, two hundred sixty-one".