1011012100221 has 32 divisors (see below), whose sum is σ = 1444333524480. Its totient is φ = 626826802176.

The previous prime is 1011012100207. The next prime is 1011012100237. The reversal of 1011012100221 is 1220012101101.

It is not a de Polignac number, because 1011012100221 - 2⁶ = 1011012100157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011012100197 and 1011012100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011012108221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1792375 + ... + 2287931.

It is an arithmetic number, because the mean of its divisors is an integer number (45135422640).

Almost surely, 2^{1011012100221} is an apocalyptic number.

It is an amenable number.

1011012100221 is a deficient number, since it is larger than the sum of its proper divisors (433321424259).

1011012100221 is a wasteful number, since it uses less digits than its factorization.

1011012100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496053.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011012100221 its reverse (1220012101101), we get a palindrome (2231024201322).

The spelling of 1011012100221 in words is "one trillion, eleven billion, twelve million, one hundred thousand, two hundred twenty-one".