1011021112221 has 8 divisors (see below), whose sum is σ = 1366494288960. Its totient is φ = 664781005152.

The previous prime is 1011021112207. The next prime is 1011021112229. The reversal of 1011021112221 is 1222111201101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011021112221 - 2²³ = 1011012723613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011021112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021112229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2308267161 + ... + 2308267598.

It is an arithmetic number, because the mean of its divisors is an integer number (170811786120).

Almost surely, 2^{1011021112221} is an apocalyptic number.

It is an amenable number.

1011021112221 is a deficient number, since it is larger than the sum of its proper divisors (355473176739).

1011021112221 is an equidigital number, since it uses as much as digits as its factorization.

1011021112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616534835.

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

Adding to 1011021112221 its reverse (1222111201101), we get a palindrome (2233132313322).

The spelling of 1011021112221 in words is "one trillion, eleven billion, twenty-one million, one hundred twelve thousand, two hundred twenty-one".