2121331354 has 16 divisors (see below), whose sum is σ = 3369907008. Its totient is φ = 999405792.

The previous prime is 2121331343. The next prime is 2121331357. The reversal of 2121331354 is 4531331212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2121331357) 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, 341067 + ... + 347230.

It is an arithmetic number, because the mean of its divisors is an integer number (210619188).

Almost surely, 2^2121331354 is an apocalyptic number.

2121331354 is a deficient number, since it is larger than the sum of its proper divisors (1248575654).

2121331354 is a wasteful number, since it uses less digits than its factorization.

2121331354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688389.

The product of its digits is 2160, while the sum is 25.

The square root of 2121331354 is about 46057.9130443402. The cubic root of 2121331354 is about 1284.9005164546.

Adding to 2121331354 its reverse (4531331212), we get a palindrome (6652662566).

The spelling of 2121331354 in words is "two billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred fifty-four".