1210213021231 has 4 divisors (see below), whose sum is σ = 1210217010264. Its totient is φ = 1210209032200.

The previous prime is 1210213021229. The next prime is 1210213021247. The reversal of 1210213021231 is 1321203120121.

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 1210213021231 - 2¹ = 1210213021229 is a prime.

It is a super-2 number, since 2×1210213021231² (a number of 25 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 = 1210213021199 and 1210213021208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210213021261) 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, 1498285 + ... + 2159926.

It is an arithmetic number, because the mean of its divisors is an integer number (302554252566).

Almost surely, 2^{1210213021231} is an apocalyptic number.

1210213021231 is a deficient number, since it is larger than the sum of its proper divisors (3989033).

1210213021231 is an equidigital number, since it uses as much as digits as its factorization.

1210213021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989032.

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

Adding to 1210213021231 its reverse (1321203120121), we get a palindrome (2531416141352).

The spelling of 1210213021231 in words is "one trillion, two hundred ten billion, two hundred thirteen million, twenty-one thousand, two hundred thirty-one".