1021200210321 has 32 divisors (see below), whose sum is σ = 1396564561920. Its totient is φ = 663570745344.

The previous prime is 1021200210307. The next prime is 1021200210377. The reversal of 1021200210321 is 1230120021201.

It is not a de Polignac number, because 1021200210321 - 2⁷ = 1021200210193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021200210321.

It is not an unprimeable number, because it can be changed into a prime (1021200210301) 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 31 ways as a sum of consecutive naturals, for example, 9086745 + ... + 9198441.

It is an arithmetic number, because the mean of its divisors is an integer number (43642642560).

Almost surely, 2^{1021200210321} is an apocalyptic number.

It is an amenable number.

1021200210321 is a deficient number, since it is larger than the sum of its proper divisors (375364351599).

1021200210321 is a wasteful number, since it uses less digits than its factorization.

1021200210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112265.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1021200210321 its reverse (1230120021201), we get a palindrome (2251320231522).

The spelling of 1021200210321 in words is "one trillion, twenty-one billion, two hundred million, two hundred ten thousand, three hundred twenty-one".