211212010210101 has 4 divisors (see below), whose sum is σ = 281616013613472. Its totient is φ = 140808006806732.

The previous prime is 211212010210099. The next prime is 211212010210139. The reversal of 211212010210101 is 101012010212112.

It is a happy number.

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 211212010210101 - 2¹ = 211212010210099 is a prime.

It is a super-2 number, since 2×211212010210101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212010210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35202001701681 + ... + 35202001701686.

It is an arithmetic number, because the mean of its divisors is an integer number (70404003403368).

Almost surely, 2^{211212010210101} is an apocalyptic number.

It is an amenable number.

211212010210101 is a deficient number, since it is larger than the sum of its proper divisors (70404003403371).

211212010210101 is an equidigital number, since it uses as much as digits as its factorization.

211212010210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70404003403370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211212010210101 its reverse (101012010212112), we get a palindrome (312224020422213).

The spelling of 211212010210101 in words is "two hundred eleven trillion, two hundred twelve billion, ten million, two hundred ten thousand, one hundred one".