221145511300 has 72 divisors (see below), whose sum is σ = 559633625600. Its totient is φ = 75821306400.

The previous prime is 221145511289. The next prime is 221145511351. The reversal of 221145511300 is 3115541122.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3189396 + ... + 3257995.

Almost surely, 2^221145511300 is an apocalyptic number.

221145511300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221145511300 is an abundant number, since it is smaller than the sum of its proper divisors (338488114300).

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

221145511300 is a wasteful number, since it uses less digits than its factorization.

221145511300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447426 (or 6447405 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 221145511300 in words is "two hundred twenty-one billion, one hundred forty-five million, five hundred eleven thousand, three hundred".