22121201378 has 8 divisors (see below), whose sum is σ = 33183578460. Its totient is φ = 11060008560.

The previous prime is 22121201369. The next prime is 22121201437. The reversal of 22121201378 is 87310212122.

It can be written as a sum of positive squares in 2 ways, for example, as 20931434329 + 1189767049 = 144677^2 + 34493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22121201378.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247793 + ... + 325028.

Almost surely, 2^22121201378 is an apocalyptic number.

22121201378 is a deficient number, since it is larger than the sum of its proper divisors (11062377082).

22121201378 is a wasteful number, since it uses less digits than its factorization.

22121201378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592132.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 22121201378 in words is "twenty-two billion, one hundred twenty-one million, two hundred one thousand, three hundred seventy-eight".