211212221102101 has 16 divisors (see below), whose sum is σ = 215196227568000. Its totient is φ = 207262544044608.

The previous prime is 211212221102089. The next prime is 211212221102131. The reversal of 211212221102101 is 101201122212112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211212221102101 - 2¹⁷ = 211212220971029 is a prime.

It is a super-2 number, since 2×211212221102101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212221102131) 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 15 ways as a sum of consecutive naturals, for example, 666633160 + ... + 666949918.

It is an arithmetic number, because the mean of its divisors is an integer number (13449764223000).

Almost surely, 2^{211212221102101} is an apocalyptic number.

It is an amenable number.

211212221102101 is a deficient number, since it is larger than the sum of its proper divisors (3984006465899).

211212221102101 is a wasteful number, since it uses less digits than its factorization.

211212221102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370908.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211212221102101 its reverse (101201122212112), we get a palindrome (312413343314213).

The spelling of 211212221102101 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, one hundred two thousand, one hundred one".