211212110020501 has 2 divisors, whose sum is σ = 211212110020502. Its totient is φ = 211212110020500.

The previous prime is 211212110020469. The next prime is 211212110020559. The reversal of 211212110020501 is 105020011212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200087390300625 + 11124719719876 = 14145225^2 + 3335374^2 .

It is a cyclic number.

It is not a de Polignac number, because 211212110020501 - 2⁵ = 211212110020469 is a prime.

It is a super-2 number, since 2×211212110020501² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211212110080501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606055010250 + 105606055010251.

It is an arithmetic number, because the mean of its divisors is an integer number (105606055010251).

Almost surely, 2^{211212110020501} is an apocalyptic number.

It is an amenable number.

211212110020501 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212110020501 is an equidigital number, since it uses as much as digits as its factorization.

211212110020501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 211212110020501 its reverse (105020011212112), we get a palindrome (316232121232613).

The spelling of 211212110020501 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred ten million, twenty thousand, five hundred one".