1101211120021 has 4 divisors (see below), whose sum is σ = 1107805198752. Its totient is φ = 1094617041292.

The previous prime is 1101211120007. The next prime is 1101211120043. The reversal of 1101211120021 is 1200211121011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1101211120021 - 2²³ = 1101202731413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101211119983 and 1101211120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101211120421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3297039115 + ... + 3297039448.

It is an arithmetic number, because the mean of its divisors is an integer number (276951299688).

Almost surely, 2^{1101211120021} is an apocalyptic number.

It is an amenable number.

1101211120021 is a deficient number, since it is larger than the sum of its proper divisors (6594078731).

1101211120021 is an equidigital number, since it uses as much as digits as its factorization.

1101211120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6594078730.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1101211120021 its reverse (1200211121011), we get a palindrome (2301422241032).

The spelling of 1101211120021 in words is "one trillion, one hundred one billion, two hundred eleven million, one hundred twenty thousand, twenty-one".