212211001231 has 4 divisors (see below), whose sum is σ = 212263416000. Its totient is φ = 212158586464.

The previous prime is 212211001193. The next prime is 212211001283. The reversal of 212211001231 is 132100112212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212211001231 - 2⁷ = 212211001103 is a prime.

It is a super-2 number, since 2×212211001231² (a number of 23 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 (212211001291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26201311 + ... + 26209408.

It is an arithmetic number, because the mean of its divisors is an integer number (53065854000).

Almost surely, 2^212211001231 is an apocalyptic number.

212211001231 is a deficient number, since it is larger than the sum of its proper divisors (52414769).

212211001231 is an equidigital number, since it uses as much as digits as its factorization.

212211001231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52414768.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212211001231 its reverse (132100112212), we get a palindrome (344311113443).

The spelling of 212211001231 in words is "two hundred twelve billion, two hundred eleven million, one thousand, two hundred thirty-one".