2126215504442 has 4 divisors (see below), whose sum is σ = 3189323256666. Its totient is φ = 1063107752220.

The previous prime is 2126215504417. The next prime is 2126215504447. The reversal of 2126215504442 is 2444055126212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1842722085961 + 283493418481 = 1357469^2 + 532441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2126215504396 and 2126215504405.

It is not an unprimeable number, because it can be changed into a prime (2126215504447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 531553876109 + ... + 531553876112.

Almost surely, 2^{2126215504442} is an apocalyptic number.

2126215504442 is a deficient number, since it is larger than the sum of its proper divisors (1063107752224).

2126215504442 is a wasteful number, since it uses less digits than its factorization.

2126215504442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063107752223.

The product of its (nonzero) digits is 153600, while the sum is 38.

The spelling of 2126215504442 in words is "two trillion, one hundred twenty-six billion, two hundred fifteen million, five hundred four thousand, four hundred forty-two".