100001220210021 has 48 divisors (see below), whose sum is σ = 145790045786112. Its totient is φ = 60938469633600.

The previous prime is 100001220209977. The next prime is 100001220210049. The reversal of 100001220210021 is 120012022100001.

It is not a de Polignac number, because 100001220210021 - 2⁴² = 95603173698917 is a prime.

It is a super-2 number, since 2×100001220210021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100001220209979 and 100001220210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001220710021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1273683156 + ... + 1273761666.

It is an arithmetic number, because the mean of its divisors is an integer number (3037292620544).

Almost surely, 2^{100001220210021} is an apocalyptic number.

It is an amenable number.

100001220210021 is a deficient number, since it is larger than the sum of its proper divisors (45788825576091).

100001220210021 is a wasteful number, since it uses less digits than its factorization.

100001220210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103034 (or 103021 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100001220210021 its reverse (120012022100001), we get a palindrome (220013242310022).

The spelling of 100001220210021 in words is "one hundred trillion, one billion, two hundred twenty million, two hundred ten thousand, twenty-one".