1442212120091 has 2 divisors, whose sum is σ = 1442212120092. Its totient is φ = 1442212120090.

The previous prime is 1442212120087. The next prime is 1442212120109. The reversal of 1442212120091 is 1900212122441.

It is a happy number.

Together with next prime (1442212120109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1442212120091 - 2² = 1442212120087 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1442212120001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721106060045 + 721106060046.

It is an arithmetic number, because the mean of its divisors is an integer number (721106060046).

Almost surely, 2^{1442212120091} is an apocalyptic number.

1442212120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442212120091 is an equidigital number, since it uses as much as digits as its factorization.

1442212120091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 1442212120091 in words is "one trillion, four hundred forty-two billion, two hundred twelve million, one hundred twenty thousand, ninety-one".