10202120120221 has 16 divisors (see below), whose sum is σ = 10642962496320. Its totient is φ = 9770765397120.

The previous prime is 10202120120219. The next prime is 10202120120267. The reversal of 10202120120221 is 12202102120201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10202120120221 - 2¹ = 10202120120219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202120120195 and 10202120120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202120120281) 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, 2275806 + ... + 5058016.

It is an arithmetic number, because the mean of its divisors is an integer number (665185156020).

Almost surely, 2^{10202120120221} is an apocalyptic number.

It is an amenable number.

10202120120221 is a deficient number, since it is larger than the sum of its proper divisors (440842376099).

10202120120221 is a wasteful number, since it uses less digits than its factorization.

10202120120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783916.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10202120120221 its reverse (12202102120201), we get a palindrome (22404222240422).

The spelling of 10202120120221 in words is "ten trillion, two hundred two billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".