1011012112221 has 4 divisors (see below), whose sum is σ = 1348016149632. Its totient is φ = 674008074812.

The previous prime is 1011012112169. The next prime is 1011012112247. The reversal of 1011012112221 is 1222112101101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011012112221 - 2⁶ = 1011012112157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011012112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011012812221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168502018701 + ... + 168502018706.

It is an arithmetic number, because the mean of its divisors is an integer number (337004037408).

Almost surely, 2^{1011012112221} is an apocalyptic number.

It is an amenable number.

1011012112221 is a deficient number, since it is larger than the sum of its proper divisors (337004037411).

1011012112221 is an equidigital number, since it uses as much as digits as its factorization.

1011012112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337004037410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1011012112221 its reverse (1222112101101), we get a palindrome (2233124213322).

The spelling of 1011012112221 in words is "one trillion, eleven billion, twelve million, one hundred twelve thousand, two hundred twenty-one".