142121219 has 2 divisors, whose sum is σ = 142121220. Its totient is φ = 142121218.

The previous prime is 142121179. The next prime is 142121251. The reversal of 142121219 is 912121241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142121219 - 2⁸ = 142120963 is a prime.

It is a super-2 number, since 2×142121219² = 40396881780091922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142121194 and 142121203.

It is not a weakly prime, because it can be changed into another prime (142121269) 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 as a sum of consecutive naturals, namely, 71060609 + 71060610.

It is an arithmetic number, because the mean of its divisors is an integer number (71060610).

Almost surely, 2^142121219 is an apocalyptic number.

142121219 is a deficient number, since it is larger than the sum of its proper divisors (1).

142121219 is an equidigital number, since it uses as much as digits as its factorization.

142121219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 142121219 is about 11921.4604390570. The cubic root of 142121219 is about 521.8587559408.

The spelling of 142121219 in words is "one hundred forty-two million, one hundred twenty-one thousand, two hundred nineteen".