1213056121 has 8 divisors (see below), whose sum is σ = 1286958080. Its totient is φ = 1140159888.

The previous prime is 1213056073. The next prime is 1213056149. The reversal of 1213056121 is 1216503121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213056121 - 2²⁷ = 1078838393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213056092 and 1213056101.

It is not an unprimeable number, because it can be changed into a prime (1213056181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248946 + ... + 253771.

It is an arithmetic number, because the mean of its divisors is an integer number (160869760).

Almost surely, 2^1213056121 is an apocalyptic number.

It is an amenable number.

1213056121 is a deficient number, since it is larger than the sum of its proper divisors (73901959).

1213056121 is a wasteful number, since it uses less digits than its factorization.

1213056121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502863.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1213056121 is about 34828.9552097102. The cubic root of 1213056121 is about 1066.4986200870.

Adding to 1213056121 its reverse (1216503121), we get a palindrome (2429559242).

The spelling of 1213056121 in words is "one billion, two hundred thirteen million, fifty-six thousand, one hundred twenty-one".