2122002421 has 16 divisors (see below), whose sum is σ = 2730958848. Its totient is φ = 1600167600.

The previous prime is 2122002419. The next prime is 2122002427. The reversal of 2122002421 is 1242002212.

It is a cyclic number.

It is not a de Polignac number, because 2122002421 - 2¹ = 2122002419 is a prime.

It is a super-2 number, since 2×2122002421² = 9005788549459722482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122002395 and 2122002404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122002427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442105 + ... + 446878.

It is an arithmetic number, because the mean of its divisors is an integer number (170684928).

Almost surely, 2^2122002421 is an apocalyptic number.

It is an amenable number.

2122002421 is a deficient number, since it is larger than the sum of its proper divisors (608956427).

2122002421 is a wasteful number, since it uses less digits than its factorization.

2122002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889032.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2122002421 is about 46065.1975031042. The cubic root of 2122002421 is about 1285.0359916640.

Adding to 2122002421 its reverse (1242002212), we get a palindrome (3364004633).

The spelling of 2122002421 in words is "two billion, one hundred twenty-two million, two thousand, four hundred twenty-one".