222121210009997 has 2 divisors, whose sum is σ = 222121210009998. Its totient is φ = 222121210009996.

The previous prime is 222121210009981. The next prime is 222121210010039. The reversal of 222121210009997 is 799900012121222.

222121210009997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123199766012521 + 98921443997476 = 11099539^2 + 9945926^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121210009997 - 2⁴ = 222121210009981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121210009967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060605004998 + 111060605004999.

It is an arithmetic number, because the mean of its divisors is an integer number (111060605004999).

Almost surely, 2^{222121210009997} is an apocalyptic number.

It is an amenable number.

222121210009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121210009997 is an equidigital number, since it uses as much as digits as its factorization.

222121210009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 222121210009997 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred ten million, nine thousand, nine hundred ninety-seven".