10002020122221 has 32 divisors (see below), whose sum is σ = 13570036916352. Its totient is φ = 6551714211840.

The previous prime is 10002020122219. The next prime is 10002020122291. The reversal of 10002020122221 is 12222102020001.

It is not a de Polignac number, because 10002020122221 - 2¹ = 10002020122219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10002020122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002020122291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262825431 + ... + 262863483.

It is an arithmetic number, because the mean of its divisors is an integer number (424063653636).

Almost surely, 2^{10002020122221} is an apocalyptic number.

It is an amenable number.

10002020122221 is a deficient number, since it is larger than the sum of its proper divisors (3568016794131).

10002020122221 is a wasteful number, since it uses less digits than its factorization.

10002020122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42653.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 10002020122221 its reverse (12222102020001), we get a palindrome (22224122142222).

The spelling of 10002020122221 in words is "ten trillion, two billion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".