221012553154 has 8 divisors (see below), whose sum is σ = 333503972928. Its totient is φ = 109844562180.

The previous prime is 221012553137. The next prime is 221012553161. The reversal of 221012553154 is 451355210122.

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

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, 330856782 + ... + 330857449.

It is an arithmetic number, because the mean of its divisors is an integer number (41687996616).

Almost surely, 2^221012553154 is an apocalyptic number.

221012553154 is a deficient number, since it is larger than the sum of its proper divisors (112491419774).

221012553154 is a wasteful number, since it uses less digits than its factorization.

221012553154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661714400.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 221012553154 its reverse (451355210122), we get a palindrome (672367763276).

The spelling of 221012553154 in words is "two hundred twenty-one billion, twelve million, five hundred fifty-three thousand, one hundred fifty-four".