2121213040 has 40 divisors (see below), whose sum is σ = 5001295968. Its totient is φ = 836532480.

The previous prime is 2121213007. The next prime is 2121213041. The reversal of 2121213040 is 403121212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2121213040² = 8999089522132083200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121213041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181047 + ... + 192406.

Almost surely, 2^2121213040 is an apocalyptic number.

2121213040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121213040 is an abundant number, since it is smaller than the sum of its proper divisors (2880082928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121213040 is a wasteful number, since it uses less digits than its factorization.

2121213040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373537 (or 373531 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121213040 is about 46056.6286217304. The cubic root of 2121213040 is about 1284.8766282258.

Adding to 2121213040 its reverse (403121212), we get a palindrome (2524334252).

The spelling of 2121213040 in words is "two billion, one hundred twenty-one million, two hundred thirteen thousand, forty".