220001002110021 has 32 divisors (see below), whose sum is σ = 321577310186496. Its totient is φ = 132678796208000.

The previous prime is 220001002110013. The next prime is 220001002110023. The reversal of 220001002110021 is 120011200100022.

It is a cyclic number.

It is not a de Polignac number, because 220001002110021 - 2³ = 220001002110013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220001002109979 and 220001002110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001002110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12234840 + ... + 24283601.

It is an arithmetic number, because the mean of its divisors is an integer number (10049290943328).

Almost surely, 2^{220001002110021} is an apocalyptic number.

It is an amenable number.

220001002110021 is a deficient number, since it is larger than the sum of its proper divisors (101576308076475).

220001002110021 is a wasteful number, since it uses less digits than its factorization.

220001002110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36519353.

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

Adding to 220001002110021 its reverse (120011200100022), we get a palindrome (340012202210043).

The spelling of 220001002110021 in words is "two hundred twenty trillion, one billion, two million, one hundred ten thousand, twenty-one".