1002020211221 has 16 divisors (see below), whose sum is σ = 1013301811200. Its totient is φ = 990796520448.

The previous prime is 1002020211211. The next prime is 1002020211253. The reversal of 1002020211221 is 1221120202001.

It is a cyclic number.

It is not a de Polignac number, because 1002020211221 - 2¹⁴ = 1002020194837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002020211196 and 1002020211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002020211211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55476890 + ... + 55494948.

It is an arithmetic number, because the mean of its divisors is an integer number (63331363200).

Almost surely, 2^{1002020211221} is an apocalyptic number.

It is an amenable number.

1002020211221 is a deficient number, since it is larger than the sum of its proper divisors (11281599979).

1002020211221 is a wasteful number, since it uses less digits than its factorization.

1002020211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19628.

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

Adding to 1002020211221 its reverse (1221120202001), we get a palindrome (2223140413222).

The spelling of 1002020211221 in words is "one trillion, two billion, twenty million, two hundred eleven thousand, two hundred twenty-one".