2121323223011 has 4 divisors (see below), whose sum is σ = 2121328037400. Its totient is φ = 2121318408624.

The previous prime is 2121323222957. The next prime is 2121323223013. The reversal of 2121323223011 is 1103223231212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121323223011 - 2¹⁴ = 2121323206627 is a prime.

It is a super-2 number, since 2×2121323223011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121323223013) 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, 1671266 + ... + 2652503.

It is an arithmetic number, because the mean of its divisors is an integer number (530332009350).

Almost surely, 2^{2121323223011} is an apocalyptic number.

2121323223011 is a deficient number, since it is larger than the sum of its proper divisors (4814389).

2121323223011 is an equidigital number, since it uses as much as digits as its factorization.

2121323223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4814388.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2121323223011 its reverse (1103223231212), we get a palindrome (3224546454223).

The spelling of 2121323223011 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-three million, two hundred twenty-three thousand, eleven".