10202021101221 has 64 divisors (see below), whose sum is σ = 14237851576320. Its totient is φ = 6491427989760.

The previous prime is 10202021101211. The next prime is 10202021101231. The reversal of 10202021101221 is 12210112020201.

It is an interprime number because it is at equal distance from previous prime (10202021101211) and next prime (10202021101231).

It is not a de Polignac number, because 10202021101221 - 2¹⁰ = 10202021100197 is a prime.

It is a super-3 number, since 3×10202021101221³ (a number of 40 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10202021101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202021101211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6119987830 + ... + 6119989496.

It is an arithmetic number, because the mean of its divisors is an integer number (222466430880).

Almost surely, 2^{10202021101221} is an apocalyptic number.

It is an amenable number.

10202021101221 is a deficient number, since it is larger than the sum of its proper divisors (4035830475099).

10202021101221 is a wasteful number, since it uses less digits than its factorization.

10202021101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10202021101221 its reverse (12210112020201), we get a palindrome (22412133121422).

The spelling of 10202021101221 in words is "ten trillion, two hundred two billion, twenty-one million, one hundred one thousand, two hundred twenty-one".