1210142221 has 8 divisors (see below), whose sum is σ = 1228026240. Its totient is φ = 1192368768.

The previous prime is 1210142207. The next prime is 1210142251. The reversal of 1210142221 is 1222410121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210142221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210142195 and 1210142204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210142251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5461 + ... + 49498.

It is an arithmetic number, because the mean of its divisors is an integer number (153503280).

Almost surely, 2^1210142221 is an apocalyptic number.

It is an amenable number.

1210142221 is a deficient number, since it is larger than the sum of its proper divisors (17884019).

1210142221 is an equidigital number, since it uses as much as digits as its factorization.

1210142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55283.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1210142221 is about 34787.0984849269. The cubic root of 1210142221 is about 1065.6439847221.

Adding to 1210142221 its reverse (1222410121), we get a palindrome (2432552342).

The spelling of 1210142221 in words is "one billion, two hundred ten million, one hundred forty-two thousand, two hundred twenty-one".