221123011012 has 6 divisors (see below), whose sum is σ = 386965269278. Its totient is φ = 110561505504.

The previous prime is 221123011003. The next prime is 221123011051. The reversal of 221123011012 is 210110321122.

It can be written as a sum of positive squares in only one way, i.e., 179010225216 + 42112785796 = 423096^2 + 205214^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640376373 + ... + 27640376380.

Almost surely, 2^221123011012 is an apocalyptic number.

It is an amenable number.

221123011012 is a deficient number, since it is larger than the sum of its proper divisors (165842258266).

221123011012 is a wasteful number, since it uses less digits than its factorization.

221123011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55280752757 (or 55280752755 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221123011012 its reverse (210110321122), we get a palindrome (431233332134).

The spelling of 221123011012 in words is "two hundred twenty-one billion, one hundred twenty-three million, eleven thousand, twelve".