221020221201012 has 48 divisors (see below), whose sum is σ = 574511512135680. Its totient is φ = 73481048288064.

The previous prime is 221020221200963. The next prime is 221020221201037. The reversal of 221020221201012 is 210102122020122.

It is a happy number.

221020221201012 is a `hidden beast` number, since 2 + 210 + 20 + 221 + 201 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2671608153 + ... + 2671690880.

It is an arithmetic number, because the mean of its divisors is an integer number (11968989836160).

Almost surely, 2^{221020221201012} is an apocalyptic number.

It is an amenable number.

221020221201012 is an abundant number, since it is smaller than the sum of its proper divisors (353491290934668).

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

221020221201012 is a wasteful number, since it uses less digits than its factorization.

221020221201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343299429 (or 5343299421 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221020221201012 its reverse (210102122020122), we get a palindrome (431122343221134).

The spelling of 221020221201012 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred one thousand, twelve".