1201230321021 has 48 divisors (see below), whose sum is σ = 1774542017664. Its totient is φ = 782834913792.

The previous prime is 1201230321013. The next prime is 1201230321029.

1201230321021 is a `hidden beast` number, since 1 + 201 + 230 + 3 + 210 + 21 = 666.

1201230321021 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1201230321013) and next prime (1201230321029).

It is not a de Polignac number, because 1201230321021 - 2³ = 1201230321013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201230320985 and 1201230321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201230321029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58225510 + ... + 58246136.

It is an arithmetic number, because the mean of its divisors is an integer number (36969625368).

Almost surely, 2^{1201230321021} is an apocalyptic number.

It is an amenable number.

1201230321021 is a deficient number, since it is larger than the sum of its proper divisors (573311696643).

1201230321021 is a wasteful number, since it uses less digits than its factorization.

1201230321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21490 (or 21487 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

It can be divided in two parts, 1201230 and 321021, that added together give a palindrome (1522251).

The spelling of 1201230321021 in words is "one trillion, two hundred one billion, two hundred thirty million, three hundred twenty-one thousand, twenty-one".