2101021000221 has 32 divisors (see below), whose sum is σ = 3323695132800. Its totient is φ = 1163758752000.

The previous prime is 2101021000157. The next prime is 2101021000229. The reversal of 2101021000221 is 1220001201012.

It is not a de Polignac number, because 2101021000221 - 2⁶ = 2101021000157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101021000197 and 2101021000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101021000229) 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, 24201646 + ... + 24288303.

It is an arithmetic number, because the mean of its divisors is an integer number (103865472900).

Almost surely, 2^{2101021000221} is an apocalyptic number.

It is an amenable number.

2101021000221 is a deficient number, since it is larger than the sum of its proper divisors (1222674132579).

2101021000221 is a wasteful number, since it uses less digits than its factorization.

2101021000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48490077.

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

Adding to 2101021000221 its reverse (1220001201012), we get a palindrome (3321022201233).

The spelling of 2101021000221 in words is "two trillion, one hundred one billion, twenty-one million, two hundred twenty-one", and thus it is an aban number.