1010200001221 has 16 divisors (see below), whose sum is σ = 1035676730880. Its totient is φ = 985009283440.

The previous prime is 1010200001219. The next prime is 1010200001227. The reversal of 1010200001221 is 1221000020101.

It is a cyclic number.

It is not a de Polignac number, because 1010200001221 - 2¹ = 1010200001219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010200001198 and 1010200001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010200001227) 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, 16099110 + ... + 16161736.

It is an arithmetic number, because the mean of its divisors is an integer number (64729795680).

Almost surely, 2^{1010200001221} is an apocalyptic number.

It is an amenable number.

1010200001221 is a deficient number, since it is larger than the sum of its proper divisors (25476729659).

1010200001221 is a wasteful number, since it uses less digits than its factorization.

1010200001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64904.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1010200001221 its reverse (1221000020101), we get a palindrome (2231200021322).

The spelling of 1010200001221 in words is "one trillion, ten billion, two hundred million, one thousand, two hundred twenty-one".