1102121111221 has 8 divisors (see below), whose sum is σ = 1227827233080. Its totient is φ = 982261785792.

The previous prime is 1102121111197. The next prime is 1102121111249. The reversal of 1102121111221 is 1221111212011.

It can be written as a sum of positive squares in 4 ways, for example, as 148791490225 + 953329620996 = 385735^2 + 976386^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1102121111221 - 2²⁵ = 1102087556789 is a prime.

It is a super-2 number, since 2×1102121111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102121111195 and 1102121111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102121111281) 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, 1461698710 + ... + 1461699463.

It is an arithmetic number, because the mean of its divisors is an integer number (153478404135).

Almost surely, 2^{1102121111221} is an apocalyptic number.

It is an amenable number.

1102121111221 is a deficient number, since it is larger than the sum of its proper divisors (125706121859).

1102121111221 is a wasteful number, since it uses less digits than its factorization.

1102121111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923398215.

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

Adding to 1102121111221 its reverse (1221111212011), we get a palindrome (2323232323232).

The spelling of 1102121111221 in words is "one trillion, one hundred two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".