22010721842 has 4 divisors (see below), whose sum is σ = 33016082766. Its totient is φ = 11005360920.

The previous prime is 22010721791. The next prime is 22010721881. The reversal of 22010721842 is 24812701022.

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., 18539273281 + 3471448561 = 136159^2 + 58919^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5502680459 + ... + 5502680462.

Almost surely, 2^22010721842 is an apocalyptic number.

22010721842 is a deficient number, since it is larger than the sum of its proper divisors (11005360924).

22010721842 is a wasteful number, since it uses less digits than its factorization.

22010721842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005360923.

The product of its (nonzero) digits is 3584, while the sum is 29.

The spelling of 22010721842 in words is "twenty-two billion, ten million, seven hundred twenty-one thousand, eight hundred forty-two".