141221681 has 2 divisors, whose sum is σ = 141221682. Its totient is φ = 141221680.

The previous prime is 141221653. The next prime is 141221687. The reversal of 141221681 is 186122141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95726656 + 45495025 = 9784^2 + 6745^2 .

It is a cyclic number.

It is not a de Polignac number, because 141221681 - 2²² = 137027377 is a prime.

It is a super-2 number, since 2×141221681² = 39887126368931522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 141221681.

It is not a weakly prime, because it can be changed into another prime (141221687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70610840 + 70610841.

It is an arithmetic number, because the mean of its divisors is an integer number (70610841).

Almost surely, 2^141221681 is an apocalyptic number.

It is an amenable number.

141221681 is a deficient number, since it is larger than the sum of its proper divisors (1).

141221681 is an equidigital number, since it uses as much as digits as its factorization.

141221681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 26.

The square root of 141221681 is about 11883.6728749995. The cubic root of 141221681 is about 520.7554121779.

The spelling of 141221681 in words is "one hundred forty-one million, two hundred twenty-one thousand, six hundred eighty-one".