1121121001021 has 8 divisors (see below), whose sum is σ = 1307429739200. Its totient is φ = 960960857724.

The previous prime is 1121121000997. The next prime is 1121121001037. The reversal of 1121121001021 is 1201001211211.

It is a happy number.

It is not a de Polignac number, because 1121121001021 - 2¹³ = 1121120992829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121121000992 and 1121121001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121121001061) 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, 1634286831 + ... + 1634287516.

It is an arithmetic number, because the mean of its divisors is an integer number (163428717400).

Almost surely, 2^{1121121001021} is an apocalyptic number.

It is an amenable number.

1121121001021 is a deficient number, since it is larger than the sum of its proper divisors (186308738179).

1121121001021 is an frugal number, since it uses more digits than its factorization.

1121121001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268574368 (or 3268574354 counting only the distinct ones).

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

Adding to 1121121001021 its reverse (1201001211211), we get a palindrome (2322122212232).

The spelling of 1121121001021 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, one thousand, twenty-one".