121206461 has 6 divisors (see below), whose sum is σ = 122766462. Its totient is φ = 119666040.

The previous prime is 121206439. The next prime is 121206511. The reversal of 121206461 is 164602121.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 624100 = 10981^2 + 790^2 .

It is not a de Polignac number, because 121206461 - 2¹⁰ = 121205437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3470 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (20461077).

Almost surely, 2^121206461 is an apocalyptic number.

It is an amenable number.

121206461 is a deficient number, since it is larger than the sum of its proper divisors (1560001).

121206461 is an frugal number, since it uses more digits than its factorization.

121206461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19579 (or 19500 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 121206461 is about 11009.3805911141. The cubic root of 121206461 is about 494.8898996702.

Adding to 121206461 its reverse (164602121), we get a palindrome (285808582).

It can be divided in two parts, 12120 and 6461, that added together give a palindrome (18581).

The spelling of 121206461 in words is "one hundred twenty-one million, two hundred six thousand, four hundred sixty-one".