1102011021221 has 8 divisors (see below), whose sum is σ = 1212129329088. Its totient is φ = 1001828199900.

The previous prime is 1102011021217. The next prime is 1102011021227. The reversal of 1102011021221 is 1221201102011.

It is not a de Polignac number, because 1102011021221 - 2² = 1102011021217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102011021196 and 1102011021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102011021227) 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, 413977265 + ... + 413979926.

It is an arithmetic number, because the mean of its divisors is an integer number (151516166136).

Almost surely, 2^{1102011021221} is an apocalyptic number.

1102011021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1102011021221 is a deficient number, since it is larger than the sum of its proper divisors (110118307867).

1102011021221 is an frugal number, since it uses more digits than its factorization.

1102011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827957224 (or 827957202 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1102011021221 its reverse (1221201102011), we get a palindrome (2323212123232).

The spelling of 1102011021221 in words is "one trillion, one hundred two billion, eleven million, twenty-one thousand, two hundred twenty-one".