1230311211021 has 12 divisors (see below), whose sum is σ = 1778860187520. Its totient is φ = 819402553800.

The previous prime is 1230311210941. The next prime is 1230311211029. The reversal of 1230311211021 is 1201121130321.

1230311211021 is a `hidden beast` number, since 1 + 230 + 311 + 21 + 102 + 1 = 666.

It is not a de Polignac number, because 1230311211021 - 2¹⁸ = 1230310948877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230311210985 and 1230311211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230311211029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67067005 + ... + 67085346.

It is an arithmetic number, because the mean of its divisors is an integer number (148238348960).

Almost surely, 2^{1230311211021} is an apocalyptic number.

It is an amenable number.

1230311211021 is a deficient number, since it is larger than the sum of its proper divisors (548548976499).

1230311211021 is a wasteful number, since it uses less digits than its factorization.

1230311211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134153376 (or 134153373 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1230311211021 its reverse (1201121130321), we get a palindrome (2431432341342).

The spelling of 1230311211021 in words is "one trillion, two hundred thirty billion, three hundred eleven million, two hundred eleven thousand, twenty-one".