221060078878 has 4 divisors (see below), whose sum is σ = 331590118320. Its totient is φ = 110530039438.

The previous prime is 221060078861. The next prime is 221060078903. The reversal of 221060078878 is 878870060122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55265019718 + ... + 55265019721.

It is an arithmetic number, because the mean of its divisors is an integer number (82897529580).

Almost surely, 2^221060078878 is an apocalyptic number.

221060078878 is a deficient number, since it is larger than the sum of its proper divisors (110530039442).

221060078878 is a wasteful number, since it uses less digits than its factorization.

221060078878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110530039441.

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 221060078878 in words is "two hundred twenty-one billion, sixty million, seventy-eight thousand, eight hundred seventy-eight".