212021225220457 has 2 divisors, whose sum is σ = 212021225220458. Its totient is φ = 212021225220456.

The previous prime is 212021225220403. The next prime is 212021225220487. The reversal of 212021225220457 is 754022522120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118713140549136 + 93308084671321 = 10895556^2 + 9659611^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021225220457 - 2²³ = 212021216831849 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021225220487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010612610228 + 106010612610229.

It is an arithmetic number, because the mean of its divisors is an integer number (106010612610229).

Almost surely, 2^{212021225220457} is an apocalyptic number.

It is an amenable number.

212021225220457 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021225220457 is an equidigital number, since it uses as much as digits as its factorization.

212021225220457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 37.

Adding to 212021225220457 its reverse (754022522120212), we get a palindrome (966043747340669).

The spelling of 212021225220457 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty-five million, two hundred twenty thousand, four hundred fifty-seven".