1020210100221 has 16 divisors (see below), whose sum is σ = 1465361031680. Its totient is φ = 627631329600.

The previous prime is 1020210100163. The next prime is 1020210100253. The reversal of 1020210100221 is 1220010120201.

It is not a de Polignac number, because 1020210100221 - 2⁹ = 1020210099709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020210100197 and 1020210100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020210105221) 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, 3833581 + ... + 4091058.

It is an arithmetic number, because the mean of its divisors is an integer number (91585064480).

Almost surely, 2^{1020210100221} is an apocalyptic number.

It is an amenable number.

1020210100221 is a deficient number, since it is larger than the sum of its proper divisors (445150931459).

1020210100221 is a wasteful number, since it uses less digits than its factorization.

1020210100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7927956.

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

Adding to 1020210100221 its reverse (1220010120201), we get a palindrome (2240220220422).

The spelling of 1020210100221 in words is "one trillion, twenty billion, two hundred ten million, one hundred thousand, two hundred twenty-one".