1210223121 has 8 divisors (see below), whose sum is σ = 1657242624. Its totient is φ = 785009520.

The previous prime is 1210223011. The next prime is 1210223129. The reversal of 1210223121 is 1213220121.

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

It is not a de Polignac number, because 1210223121 - 2¹⁷ = 1210092049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210223121.

It is not an unprimeable number, because it can be changed into a prime (1210223129) 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, 5451345 + ... + 5451566.

It is an arithmetic number, because the mean of its divisors is an integer number (207155328).

Almost surely, 2^1210223121 is an apocalyptic number.

It is an amenable number.

1210223121 is a deficient number, since it is larger than the sum of its proper divisors (447019503).

1210223121 is a wasteful number, since it uses less digits than its factorization.

1210223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10902951.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1210223121 is about 34788.2612528997. The cubic root of 1210223121 is about 1065.6677308779.

Adding to 1210223121 its reverse (1213220121), we get a palindrome (2423443242).

The spelling of 1210223121 in words is "one billion, two hundred ten million, two hundred twenty-three thousand, one hundred twenty-one".