1002201221021 has 32 divisors (see below), whose sum is σ = 1346168264448. Its totient is φ = 720566461440.

The previous prime is 1002201221011. The next prime is 1002201221027. The reversal of 1002201221021 is 1201221022001.

It is a de Polignac number, because none of the positive numbers 2^k-1002201221021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002201220987 and 1002201221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002201221027) 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 31 ways as a sum of consecutive naturals, for example, 2234021 + ... + 2644853.

It is an arithmetic number, because the mean of its divisors is an integer number (42067758264).

Almost surely, 2^{1002201221021} is an apocalyptic number.

1002201221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002201221021 is a deficient number, since it is larger than the sum of its proper divisors (343967043427).

1002201221021 is a wasteful number, since it uses less digits than its factorization.

1002201221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413301.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1002201221021 its reverse (1201221022001), we get a palindrome (2203422243022).

The spelling of 1002201221021 in words is "one trillion, two billion, two hundred one million, two hundred twenty-one thousand, twenty-one".