211212110001 has 32 divisors (see below), whose sum is σ = 293977571328. Its totient is φ = 134732459520.

The previous prime is 211212109993. The next prime is 211212110029. The reversal of 211212110001 is 100011212112.

It is not a de Polignac number, because 211212110001 - 2³ = 211212109993 is a prime.

It is a super-2 number, since 2×211212110001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212110201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9939550 + ... + 9960776.

It is an arithmetic number, because the mean of its divisors is an integer number (9186799104).

Almost surely, 2^211212110001 is an apocalyptic number.

It is an amenable number.

211212110001 is a deficient number, since it is larger than the sum of its proper divisors (82765461327).

211212110001 is a wasteful number, since it uses less digits than its factorization.

211212110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22461.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211212110001 its reverse (100011212112), we get a palindrome (311223322113).

The spelling of 211212110001 in words is "two hundred eleven billion, two hundred twelve million, one hundred ten thousand, one".