147012221 has 2 divisors, whose sum is σ = 147012222. Its totient is φ = 147012220.

The previous prime is 147012179. The next prime is 147012233. The reversal of 147012221 is 122210741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143736121 + 3276100 = 11989^2 + 1810^2 .

It is a cyclic number.

It is not a de Polignac number, because 147012221 - 2⁶ = 147012157 is a prime.

It is a super-2 number, since 2×147012221² = 43225186246705682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 147012193 and 147012202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147012421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73506110 + 73506111.

It is an arithmetic number, because the mean of its divisors is an integer number (73506111).

Almost surely, 2^147012221 is an apocalyptic number.

It is an amenable number.

147012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

147012221 is an equidigital number, since it uses as much as digits as its factorization.

147012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 147012221 is about 12124.8596280534. The cubic root of 147012221 is about 527.7778337687. Note that the first 3 decimals are identical.

Adding to 147012221 its reverse (122210741), we get a palindrome (269222962).

The spelling of 147012221 in words is "one hundred forty-seven million, twelve thousand, two hundred twenty-one".