10020211221 has 16 divisors (see below), whose sum is σ = 13396377600. Its totient is φ = 6662118960.

The previous prime is 10020211169. The next prime is 10020211231. The reversal of 10020211221 is 12211202001.

It is not a de Polignac number, because 10020211221 - 2¹³ = 10020203029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10020211197 and 10020211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020211231) 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, 2085580 + ... + 2090378.

It is an arithmetic number, because the mean of its divisors is an integer number (837273600).

Almost surely, 2^10020211221 is an apocalyptic number.

It is an amenable number.

10020211221 is a deficient number, since it is larger than the sum of its proper divisors (3376166379).

10020211221 is a wasteful number, since it uses less digits than its factorization.

10020211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10020211221 its reverse (12211202001), we get a palindrome (22231413222).

The spelling of 10020211221 in words is "ten billion, twenty million, two hundred eleven thousand, two hundred twenty-one".