2121133444 has 12 divisors (see below), whose sum is σ = 3712306444. Its totient is φ = 1060474464.

The previous prime is 2121133433. The next prime is 2121133459. The reversal of 2121133444 is 4443311212.

It can be written as a sum of positive squares in 2 ways, for example, as 1386072900 + 735060544 = 37230^2 + 27112^2 .

It is a super-2 number, since 2×2121133444² = 8998414174510602272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74842 + ... + 99214.

Almost surely, 2^2121133444 is an apocalyptic number.

It is an amenable number.

2121133444 is a deficient number, since it is larger than the sum of its proper divisors (1591173000).

2121133444 is a wasteful number, since it uses less digits than its factorization.

2121133444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46134 (or 46132 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 2121133444 is about 46055.7645034799. The cubic root of 2121133444 is about 1284.8605568683.

Adding to 2121133444 its reverse (4443311212), we get a palindrome (6564444656).

The spelling of 2121133444 in words is "two billion, one hundred twenty-one million, one hundred thirty-three thousand, four hundred forty-four".