1221014143 has 8 divisors (see below), whose sum is σ = 1261077120. Its totient is φ = 1180993440.

The previous prime is 1221014131. The next prime is 1221014161. The reversal of 1221014143 is 3414101221.

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 1221014143 - 2¹⁷ = 1220883071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221014143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221014183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54621 + ... + 73657.

It is an arithmetic number, because the mean of its divisors is an integer number (157634640).

Almost surely, 2^1221014143 is an apocalyptic number.

1221014143 is a deficient number, since it is larger than the sum of its proper divisors (40062977).

1221014143 is a wasteful number, since it uses less digits than its factorization.

1221014143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21137.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1221014143 is about 34943.0127922593. The cubic root of 1221014143 is about 1068.8257251817.

Adding to 1221014143 its reverse (3414101221), we get a palindrome (4635115364).

The spelling of 1221014143 in words is "one billion, two hundred twenty-one million, fourteen thousand, one hundred forty-three".