211211000001 has 12 divisors (see below), whose sum is σ = 305087008512. Its totient is φ = 140805278136.

The previous prime is 211210999931. The next prime is 211211000023. The reversal of 211211000001 is 100000112112.

It is a happy number.

It is not a de Polignac number, because 211211000001 - 2¹¹ = 211210997953 is a prime.

It is a super-2 number, since 2×211211000001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211211000101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 728260 + ... + 976106.

It is an arithmetic number, because the mean of its divisors is an integer number (25423917376).

Almost surely, 2^211211000001 is an apocalyptic number.

It is an amenable number.

211211000001 is a deficient number, since it is larger than the sum of its proper divisors (93876008511).

211211000001 is a wasteful number, since it uses less digits than its factorization.

211211000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342540 (or 342537 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 211211000001 its reverse (100000112112), we get a palindrome (311211112113).

The spelling of 211211000001 in words is "two hundred eleven billion, two hundred eleven million, one", and thus it is an aban number.