211212210220001 has 4 divisors (see below), whose sum is σ = 218025507323904. Its totient is φ = 204398913116100.

The previous prime is 211212210219937. The next prime is 211212210220013. The reversal of 211212210220001 is 100022012212112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211212210220001 - 2⁶ = 211212210219937 is a prime.

It is a super-2 number, since 2×211212210220001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212210220601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406648551905 + ... + 3406648551966.

It is an arithmetic number, because the mean of its divisors is an integer number (54506376830976).

Almost surely, 2^{211212210220001} is an apocalyptic number.

It is an amenable number.

211212210220001 is a deficient number, since it is larger than the sum of its proper divisors (6813297103903).

211212210220001 is an equidigital number, since it uses as much as digits as its factorization.

211212210220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813297103902.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212210220001 its reverse (100022012212112), we get a palindrome (311234222432113).

The spelling of 211212210220001 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, one".