2123421040 has 80 divisors (see below), whose sum is σ = 5629514688. Its totient is φ = 737906688.

The previous prime is 2123421011. The next prime is 2123421089. The reversal of 2123421040 is 401243212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2123421040² = 9017833826229363200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123420999 and 2123421017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42372 + ... + 77731.

Almost surely, 2^2123421040 is an apocalyptic number.

2123421040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123421040 is an abundant number, since it is smaller than the sum of its proper divisors (3506093648).

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

2123421040 is a wasteful number, since it uses less digits than its factorization.

2123421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120146 (or 120140 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2123421040 is about 46080.5928781304. The cubic root of 2123421040 is about 1285.3222889162.

Adding to 2123421040 its reverse (401243212), we get a palindrome (2524664252).

The spelling of 2123421040 in words is "two billion, one hundred twenty-three million, four hundred twenty-one thousand, forty".