1230310213021 has 6 divisors (see below), whose sum is σ = 1257043981790. Its totient is φ = 1204133397816.

The previous prime is 1230310212997. The next prime is 1230310213061. The reversal of 1230310213021 is 1203120130321.

It can be written as a sum of positive squares in only one way, i.e., 722491500025 + 507818712996 = 849995^2 + 712614^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1230310213021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230310213021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230310213061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278474526 + ... + 278478943.

Almost surely, 2^{1230310213021} is an apocalyptic number.

It is an amenable number.

1230310213021 is a deficient number, since it is larger than the sum of its proper divisors (26733768769).

1230310213021 is an frugal number, since it uses more digits than its factorization.

1230310213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556953563 (or 556953516 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1230310213021 its reverse (1203120130321), we get a palindrome (2433430343342).

The spelling of 1230310213021 in words is "one trillion, two hundred thirty billion, three hundred ten million, two hundred thirteen thousand, twenty-one".