1101012111221 has 16 divisors (see below), whose sum is σ = 1207875859008. Its totient is φ = 995278233600.

The previous prime is 1101012111191. The next prime is 1101012111233. The reversal of 1101012111221 is 1221112101011.

It is a cyclic number.

It is not a de Polignac number, because 1101012111221 - 2³⁴ = 1083832242037 is a prime.

It is a super-2 number, since 2×1101012111221² (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 = 1101012111196 and 1101012111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101012111271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21383510 + ... + 21434936.

It is an arithmetic number, because the mean of its divisors is an integer number (75492241188).

Almost surely, 2^{1101012111221} is an apocalyptic number.

1101012111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1101012111221 is a deficient number, since it is larger than the sum of its proper divisors (106863747787).

1101012111221 is a wasteful number, since it uses less digits than its factorization.

1101012111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62372.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1101012111221 its reverse (1221112101011), we get a palindrome (2322124212232).

The spelling of 1101012111221 in words is "one trillion, one hundred one billion, twelve million, one hundred eleven thousand, two hundred twenty-one".