231222213011 has 16 divisors (see below), whose sum is σ = 245478068640. Its totient is φ = 217405144320.

The previous prime is 231222212971. The next prime is 231222213041. The reversal of 231222213011 is 110312222132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231222213011 is a prime.

It is a super-2 number, since 2×231222213011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231222213041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472625 + ... + 828141.

It is an arithmetic number, because the mean of its divisors is an integer number (15342379290).

Almost surely, 2^231222213011 is an apocalyptic number.

231222213011 is a deficient number, since it is larger than the sum of its proper divisors (14255855629).

231222213011 is a wasteful number, since it uses less digits than its factorization.

231222213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356134.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231222213011 its reverse (110312222132), we get a palindrome (341534435143).

The spelling of 231222213011 in words is "two hundred thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, eleven".