30211121321231 has 4 divisors (see below), whose sum is σ = 30947977938864. Its totient is φ = 29474264703600.

The previous prime is 30211121321137. The next prime is 30211121321243. The reversal of 30211121321231 is 13212312111203.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30211121321231 is a prime.

It is a super-2 number, since 2×30211121321231² (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 = 30211121321197 and 30211121321206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30211121321281) 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, 368428308755 + ... + 368428308836.

It is an arithmetic number, because the mean of its divisors is an integer number (7736994484716).

Almost surely, 2^{30211121321231} is an apocalyptic number.

30211121321231 is a deficient number, since it is larger than the sum of its proper divisors (736856617633).

30211121321231 is an equidigital number, since it uses as much as digits as its factorization.

30211121321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736856617632.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 30211121321231 its reverse (13212312111203), we get a palindrome (43423433432434).

The spelling of 30211121321231 in words is "thirty trillion, two hundred eleven billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-one".