1212021143 has 2 divisors, whose sum is σ = 1212021144. Its totient is φ = 1212021142.

The previous prime is 1212021113. The next prime is 1212021169. The reversal of 1212021143 is 3411202121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212021143 - 2¹² = 1212017047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212021113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010571 + 606010572.

It is an arithmetic number, because the mean of its divisors is an integer number (606010572).

Almost surely, 2^1212021143 is an apocalyptic number.

1212021143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021143 is an equidigital number, since it uses as much as digits as its factorization.

1212021143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1212021143 is about 34814.0940281375. The cubic root of 1212021143 is about 1066.1952220113.

Adding to 1212021143 its reverse (3411202121), we get a palindrome (4623223264).

The spelling of 1212021143 in words is "one billion, two hundred twelve million, twenty-one thousand, one hundred forty-three".