1101221212021 has 8 divisors (see below), whose sum is σ = 1324777398080. Its totient is φ = 894224743488.

The previous prime is 1101221212019. The next prime is 1101221212033. The reversal of 1101221212021 is 1202121221011.

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 1101221212021 - 2¹ = 1101221212019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101221211986 and 1101221212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101221212061) 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, 4139929236 + ... + 4139929501.

It is an arithmetic number, because the mean of its divisors is an integer number (165597174760).

Almost surely, 2^{1101221212021} is an apocalyptic number.

It is an amenable number.

1101221212021 is a deficient number, since it is larger than the sum of its proper divisors (223556186059).

1101221212021 is an equidigital number, since it uses as much as digits as its factorization.

1101221212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8279858763.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1101221212021 its reverse (1202121221011), we get a palindrome (2303342433032).

The spelling of 1101221212021 in words is "one trillion, one hundred one billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".