61313121 has 12 divisors (see below), whose sum is σ = 88700560. Its totient is φ = 40812120.

The previous prime is 61313099. The next prime is 61313123. The reversal of 61313121 is 12131316.

61313121 is a `hidden beast` number, since 613 + 1 + 31 + 21 = 666.

It is not a de Polignac number, because 61313121 - 2¹¹ = 61311073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61313094 and 61313103.

It is not an unprimeable number, because it can be changed into a prime (61313123) 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, 1290 + ... + 11148.

Almost surely, 2^61313121 is an apocalyptic number.

It is an amenable number.

61313121 is a deficient number, since it is larger than the sum of its proper divisors (27387439).

61313121 is a wasteful number, since it uses less digits than its factorization.

61313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556 (or 10553 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 61313121 is about 7830.2695355907. The cubic root of 61313121 is about 394.3221209856.

Adding to 61313121 its reverse (12131316), we get a palindrome (73444437).

The spelling of 61313121 in words is "sixty-one million, three hundred thirteen thousand, one hundred twenty-one".