221050121946 has 16 divisors (see below), whose sum is σ = 442291574208. Its totient is φ = 73651485600.

The previous prime is 221050121939. The next prime is 221050121959. The reversal of 221050121946 is 649121050122.

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, 7957075 + ... + 7984806.

It is an arithmetic number, because the mean of its divisors is an integer number (27643223388).

Almost surely, 2^221050121946 is an apocalyptic number.

221050121946 is an abundant number, since it is smaller than the sum of its proper divisors (221241452262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221050121946 is a wasteful number, since it uses less digits than its factorization.

221050121946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15944197.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 221050121946 in words is "two hundred twenty-one billion, fifty million, one hundred twenty-one thousand, nine hundred forty-six".