23211011213031 has 4 divisors (see below), whose sum is σ = 30948014950712. Its totient is φ = 15474007475352.

The previous prime is 23211011213017. The next prime is 23211011213149. The reversal of 23211011213031 is 13031211011232.

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

It is not a de Polignac number, because 23211011213031 - 2⁵ = 23211011212999 is a prime.

It is a super-2 number, since 2×23211011213031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23211011212989 and 23211011213007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211011213011) 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, 3868501868836 + ... + 3868501868841.

It is an arithmetic number, because the mean of its divisors is an integer number (7737003737678).

Almost surely, 2^{23211011213031} is an apocalyptic number.

23211011213031 is a deficient number, since it is larger than the sum of its proper divisors (7737003737681).

23211011213031 is an equidigital number, since it uses as much as digits as its factorization.

23211011213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737003737680.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 23211011213031 its reverse (13031211011232), we get a palindrome (36242222224263).

The spelling of 23211011213031 in words is "twenty-three trillion, two hundred eleven billion, eleven million, two hundred thirteen thousand, thirty-one".