1020112021221 has 8 divisors (see below), whose sum is σ = 1378781544960. Its totient is φ = 670758589152.

The previous prime is 1020112021151. The next prime is 1020112021249. The reversal of 1020112021221 is 1221202110201.

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

It is not a de Polignac number, because 1020112021221 - 2³⁴ = 1002932152037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020112021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020112021261) 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, 2329022661 + ... + 2329023098.

It is an arithmetic number, because the mean of its divisors is an integer number (172347693120).

Almost surely, 2^{1020112021221} is an apocalyptic number.

It is an amenable number.

1020112021221 is a deficient number, since it is larger than the sum of its proper divisors (358669523739).

1020112021221 is an equidigital number, since it uses as much as digits as its factorization.

1020112021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658045835.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1020112021221 its reverse (1221202110201), we get a palindrome (2241314131422).

The spelling of 1020112021221 in words is "one trillion, twenty billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".