221211011012 has 12 divisors (see below), whose sum is σ = 403950542016. Its totient is φ = 105796570440.

The previous prime is 221211011003. The next prime is 221211011017. The reversal of 221211011012 is 210110112122.

It is a super-2 number, since 2×221211011012² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221211011017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202233664 + ... + 1202233847.

It is an arithmetic number, because the mean of its divisors is an integer number (33662545168).

Almost surely, 2^221211011012 is an apocalyptic number.

It is an amenable number.

221211011012 is a deficient number, since it is larger than the sum of its proper divisors (182739531004).

221211011012 is a wasteful number, since it uses less digits than its factorization.

221211011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404467538 (or 2404467536 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221211011012 its reverse (210110112122), we get a palindrome (431321123134).

The spelling of 221211011012 in words is "two hundred twenty-one billion, two hundred eleven million, eleven thousand, twelve".