1101210121021 has 4 divisors (see below), whose sum is σ = 1101212495712. Its totient is φ = 1101207746332.

The previous prime is 1101210121001. The next prime is 1101210121049. The reversal of 1101210121021 is 1201210121011.

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 1101210121021 - 2²³ = 1101201732413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101210120992 and 1101210121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101210121001) 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, 239575 + ... + 1503268.

It is an arithmetic number, because the mean of its divisors is an integer number (275303123928).

Almost surely, 2^{1101210121021} is an apocalyptic number.

It is an amenable number.

1101210121021 is a deficient number, since it is larger than the sum of its proper divisors (2374691).

1101210121021 is an equidigital number, since it uses as much as digits as its factorization.

1101210121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374690.

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

Adding to 1101210121021 its reverse (1201210121011), we get a palindrome (2302420242032).

The spelling of 1101210121021 in words is "one trillion, one hundred one billion, two hundred ten million, one hundred twenty-one thousand, twenty-one".