2121023121311 has 8 divisors (see below), whose sum is σ = 2165174098560. Its totient is φ = 2077145525272.

The previous prime is 2121023121307. The next prime is 2121023121331. The reversal of 2121023121311 is 1131213201212.

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 2121023121311 - 2² = 2121023121307 is a prime.

It is a super-2 number, since 2×2121023121311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121023121331) 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, 68329625 + ... + 68360658.

It is an arithmetic number, because the mean of its divisors is an integer number (270646762320).

Almost surely, 2^{2121023121311} is an apocalyptic number.

2121023121311 is a deficient number, since it is larger than the sum of its proper divisors (44150977249).

2121023121311 is a wasteful number, since it uses less digits than its factorization.

2121023121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136690605.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2121023121311 its reverse (1131213201212), we get a palindrome (3252236322523).

The spelling of 2121023121311 in words is "two trillion, one hundred twenty-one billion, twenty-three million, one hundred twenty-one thousand, three hundred eleven".