1123220101021 has 8 divisors (see below), whose sum is σ = 1137738749400. Its totient is φ = 1108778068800.

The previous prime is 1123220101007. The next prime is 1123220101027. The reversal of 1123220101021 is 1201010223211.

It can be written as a sum of positive squares in 4 ways, for example, as 6066228996 + 1117153872025 = 77886^2 + 1056955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123220101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123220100986 and 1123220101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123220101027) 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, 19124530 + ... + 19183171.

It is an arithmetic number, because the mean of its divisors is an integer number (142217343675).

Almost surely, 2^{1123220101021} is an apocalyptic number.

It is an amenable number.

1123220101021 is a deficient number, since it is larger than the sum of its proper divisors (14518648379).

1123220101021 is a wasteful number, since it uses less digits than its factorization.

1123220101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38308079.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1123220101021 its reverse (1201010223211), we get a palindrome (2324230324232).

The spelling of 1123220101021 in words is "one trillion, one hundred twenty-three billion, two hundred twenty million, one hundred one thousand, twenty-one".