20210221002213 has 36 divisors (see below), whose sum is σ = 32954903902284. Its totient is φ = 11917575014400.

The previous prime is 20210221002193. The next prime is 20210221002227. The reversal of 20210221002213 is 31220012201202.

20210221002213 is a `hidden beast` number, since 20 + 210 + 2 + 210 + 0 + 221 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19656658217889 + 553562784324 = 4433583^2 + 744018^2 .

It is not a de Polignac number, because 20210221002213 - 2⁹ = 20210221001701 is a prime.

It is a super-3 number, since 3×20210221002213³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210221002613) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 250750428 + ... + 250831013.

Almost surely, 2^{20210221002213} is an apocalyptic number.

It is an amenable number.

20210221002213 is a deficient number, since it is larger than the sum of its proper divisors (12744682900071).

20210221002213 is a wasteful number, since it uses less digits than its factorization.

20210221002213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501581506 (or 501581492 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20210221002213 its reverse (31220012201202), we get a palindrome (51430233203415).

The spelling of 20210221002213 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, two thousand, two hundred thirteen".