100020021022221 has 16 divisors (see below), whose sum is σ = 135569843492736. Its totient is φ = 65580281496576.

The previous prime is 100020021022217. The next prime is 100020021022237. The reversal of 100020021022221 is 122220120020001.

It is not a de Polignac number, because 100020021022221 - 2² = 100020021022217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100020021022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020021022721) 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, 646824145 + ... + 646978758.

It is an arithmetic number, because the mean of its divisors is an integer number (8473115218296).

Almost surely, 2^{100020021022221} is an apocalyptic number.

It is an amenable number.

100020021022221 is a deficient number, since it is larger than the sum of its proper divisors (35549822470515).

100020021022221 is a wasteful number, since it uses less digits than its factorization.

100020021022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293803332.

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

Adding to 100020021022221 its reverse (122220120020001), we get a palindrome (222240141042222).

The spelling of 100020021022221 in words is "one hundred trillion, twenty billion, twenty-one million, twenty-two thousand, two hundred twenty-one".