210643204120157 has 2 divisors, whose sum is σ = 210643204120158. Its totient is φ = 210643204120156.

The previous prime is 210643204120093. The next prime is 210643204120189. The reversal of 210643204120157 is 751021402346012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184464775131961 + 26178428988196 = 13581781^2 + 5116486^2 .

It is a cyclic number.

It is not a de Polignac number, because 210643204120157 - 2⁶ = 210643204120093 is a prime.

It is a super-2 number, since 2×210643204120157² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210643204120157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210643204120057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105321602060078 + 105321602060079.

It is an arithmetic number, because the mean of its divisors is an integer number (105321602060079).

Almost surely, 2^{210643204120157} is an apocalyptic number.

It is an amenable number.

210643204120157 is a deficient number, since it is larger than the sum of its proper divisors (1).

210643204120157 is an equidigital number, since it uses as much as digits as its factorization.

210643204120157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

Adding to 210643204120157 its reverse (751021402346012), we get a palindrome (961664606466169).

The spelling of 210643204120157 in words is "two hundred ten trillion, six hundred forty-three billion, two hundred four million, one hundred twenty thousand, one hundred fifty-seven".