1012011011221 has 16 divisors (see below), whose sum is σ = 1193928588288. Its totient is φ = 839431238400.

The previous prime is 1012011011213. The next prime is 1012011011237. The reversal of 1012011011221 is 1221101102101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1012011011221 - 2³ = 1012011011213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012011011251) 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 15 ways as a sum of consecutive naturals, for example, 12587811 + ... + 12667951.

It is an arithmetic number, because the mean of its divisors is an integer number (74620536768).

Almost surely, 2^{1012011011221} is an apocalyptic number.

It is an amenable number.

1012011011221 is a deficient number, since it is larger than the sum of its proper divisors (181917577067).

1012011011221 is an equidigital number, since it uses as much as digits as its factorization.

1012011011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138372.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1012011011221 its reverse (1221101102101), we get a palindrome (2233112113322).

The spelling of 1012011011221 in words is "one trillion, twelve billion, eleven million, eleven thousand, two hundred twenty-one".