221131101012 has 24 divisors (see below), whose sum is σ = 516005128800. Its totient is φ = 73705715616.

The previous prime is 221131101007. The next prime is 221131101041. The reversal of 221131101012 is 210101131122.

It is a super-3 number, since 3×221131101012³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221131100982 and 221131101000.

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, 380562 + ... + 766217.

It is an arithmetic number, because the mean of its divisors is an integer number (21500213700).

Almost surely, 2^221131101012 is an apocalyptic number.

It is an amenable number.

221131101012 is an abundant number, since it is smaller than the sum of its proper divisors (294874027788).

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

221131101012 is a wasteful number, since it uses less digits than its factorization.

221131101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162855 (or 1162853 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 221131101012 its reverse (210101131122), we get a palindrome (431232232134).

The spelling of 221131101012 in words is "two hundred twenty-one billion, one hundred thirty-one million, one hundred one thousand, twelve".