20102222100021 has 16 divisors (see below), whose sum is σ = 27084253728000. Its totient is φ = 13260886668288.

The previous prime is 20102222100007. The next prime is 20102222100047. The reversal of 20102222100021 is 12000122220102.

It is not a de Polignac number, because 20102222100021 - 2²¹ = 20102220002869 is a prime.

It is a super-3 number, since 3×20102222100021³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102222100001) 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, 4753101 + ... + 7924418.

It is an arithmetic number, because the mean of its divisors is an integer number (1692765858000).

Almost surely, 2^{20102222100021} is an apocalyptic number.

It is an amenable number.

20102222100021 is a deficient number, since it is larger than the sum of its proper divisors (6982031627979).

20102222100021 is a wasteful number, since it uses less digits than its factorization.

20102222100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12683068.

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

Adding to 20102222100021 its reverse (12000122220102), we get a palindrome (32102344320123).

The spelling of 20102222100021 in words is "twenty trillion, one hundred two billion, two hundred twenty-two million, one hundred thousand, twenty-one".