2121421126 has 48 divisors (see below), whose sum is σ = 3713840928. Its totient is φ = 905020160.

The previous prime is 2121421097. The next prime is 2121421129. The reversal of 2121421126 is 6211241212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2121421097 and 2121421106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121421129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2661360 + ... + 2662156.

It is an arithmetic number, because the mean of its divisors is an integer number (77371686).

Almost surely, 2^2121421126 is an apocalyptic number.

2121421126 is a deficient number, since it is larger than the sum of its proper divisors (1592419802).

2121421126 is a wasteful number, since it uses less digits than its factorization.

2121421126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1474 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 2121421126 is about 46058.8875896933. The cubic root of 2121421126 is about 1284.9186413084.

Adding to 2121421126 its reverse (6211241212), we get a palindrome (8332662338).

The spelling of 2121421126 in words is "two billion, one hundred twenty-one million, four hundred twenty-one thousand, one hundred twenty-six".