211212223101 has 24 divisors (see below), whose sum is σ = 332882918784. Its totient is φ = 127982924160.

The previous prime is 211212223097. The next prime is 211212223127. The reversal of 211212223101 is 101322212112.

It is not a de Polignac number, because 211212223101 - 2² = 211212223097 is a prime.

It is a super-2 number, since 2×211212223101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212223141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 323020 + ... + 725786.

It is an arithmetic number, because the mean of its divisors is an integer number (13870121616).

Almost surely, 2^211212223101 is an apocalyptic number.

It is an amenable number.

211212223101 is a deficient number, since it is larger than the sum of its proper divisors (121670695683).

211212223101 is a wasteful number, since it uses less digits than its factorization.

211212223101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408081 (or 408078 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211212223101 its reverse (101322212112), we get a palindrome (312534435213).

The spelling of 211212223101 in words is "two hundred eleven billion, two hundred twelve million, two hundred twenty-three thousand, one hundred one".