1213020211231 has 2 divisors, whose sum is σ = 1213020211232. Its totient is φ = 1213020211230.

The previous prime is 1213020211229. The next prime is 1213020211243. The reversal of 1213020211231 is 1321120203121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213020211231 - 2¹ = 1213020211229 is a prime.

It is a super-2 number, since 2×1213020211231² (a number of 25 digits) contains 22 as substring.

Together with 1213020211229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1213020211199 and 1213020211208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213020211211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606510105615 + 606510105616.

It is an arithmetic number, because the mean of its divisors is an integer number (606510105616).

Almost surely, 2^{1213020211231} is an apocalyptic number.

1213020211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213020211231 is an equidigital number, since it uses as much as digits as its factorization.

1213020211231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1213020211231 its reverse (1321120203121), we get a palindrome (2534140414352).

The spelling of 1213020211231 in words is "one trillion, two hundred thirteen billion, twenty million, two hundred eleven thousand, two hundred thirty-one".