221208745342 has 16 divisors (see below), whose sum is σ = 357360328080. Its totient is φ = 102089737152.

The previous prime is 221208745337. The next prime is 221208745357. The reversal of 221208745342 is 243547802122.

It is a junction number, because it is equal to n+sod(n) for n = 221208745295 and 221208745304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146409 + ... + 681067.

It is an arithmetic number, because the mean of its divisors is an integer number (22335020505).

Almost surely, 2^221208745342 is an apocalyptic number.

221208745342 is a deficient number, since it is larger than the sum of its proper divisors (136151582738).

221208745342 is a wasteful number, since it uses less digits than its factorization.

221208745342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550587.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 221208745342 in words is "two hundred twenty-one billion, two hundred eight million, seven hundred forty-five thousand, three hundred forty-two".