221211202001012 has 6 divisors (see below), whose sum is σ = 387119603501778. Its totient is φ = 110605601000504.

The previous prime is 221211202000981. The next prime is 221211202001017. The reversal of 221211202001012 is 210100202112122.

221211202001012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 211228610094436 + 9982591906576 = 14533706^2 + 3159524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211202001017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27651400250123 + ... + 27651400250130.

It is an arithmetic number, because the mean of its divisors is an integer number (64519933916963).

Almost surely, 2^{221211202001012} is an apocalyptic number.

It is an amenable number.

221211202001012 is a deficient number, since it is larger than the sum of its proper divisors (165908401500766).

221211202001012 is a wasteful number, since it uses less digits than its factorization.

221211202001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55302800500257 (or 55302800500255 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211202001012 its reverse (210100202112122), we get a palindrome (431311404113134).

The spelling of 221211202001012 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred two million, one thousand, twelve".