1230211021 has 8 divisors (see below), whose sum is σ = 1334375840. Its totient is φ = 1127408112.

The previous prime is 1230211019. The next prime is 1230211033. The reversal of 1230211021 is 1201120321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1230211021 - 2¹ = 1230211019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230210992 and 1230211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230211061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338595 + ... + 342208.

It is an arithmetic number, because the mean of its divisors is an integer number (166796980).

Almost surely, 2^1230211021 is an apocalyptic number.

It is an amenable number.

1230211021 is a deficient number, since it is larger than the sum of its proper divisors (104164819).

1230211021 is a wasteful number, since it uses less digits than its factorization.

1230211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680955.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1230211021 is about 35074.3641567456. The cubic root of 1230211021 is about 1071.5025389806.

Adding to 1230211021 its reverse (1201120321), we get a palindrome (2431331342).

The spelling of 1230211021 in words is "one billion, two hundred thirty million, two hundred eleven thousand, twenty-one".