221122101012 has 12 divisors (see below), whose sum is σ = 515951569056. Its totient is φ = 73707367000.

The previous prime is 221122101007. The next prime is 221122101047. The reversal of 221122101012 is 210101221122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×221122101012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221122100982 and 221122101000.

It is a congruent number.

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, 9213420864 + ... + 9213420887.

It is an arithmetic number, because the mean of its divisors is an integer number (42995964088).

Almost surely, 2^221122101012 is an apocalyptic number.

It is an amenable number.

221122101012 is an abundant number, since it is smaller than the sum of its proper divisors (294829468044).

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

221122101012 is a wasteful number, since it uses less digits than its factorization.

221122101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18426841758 (or 18426841756 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221122101012 its reverse (210101221122), we get a palindrome (431223322134).

The spelling of 221122101012 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred one thousand, twelve".