221020000002212 has 6 divisors (see below), whose sum is σ = 386785000003878. Its totient is φ = 110510000001104.

The previous prime is 221020000002181. The next prime is 221020000002229. The reversal of 221020000002212 is 212200000020122.

It can be written as a sum of positive squares in only one way, i.e., 156542536796416 + 64477463205796 = 12511696^2 + 8029786^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627500000273 + ... + 27627500000280.

It is an arithmetic number, because the mean of its divisors is an integer number (64464166667313).

Almost surely, 2^{221020000002212} is an apocalyptic number.

It is an amenable number.

221020000002212 is a deficient number, since it is larger than the sum of its proper divisors (165765000001666).

221020000002212 is a wasteful number, since it uses less digits than its factorization.

221020000002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255000000557 (or 55255000000555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221020000002212 its reverse (212200000020122), we get a palindrome (433220000022334).

The spelling of 221020000002212 in words is "two hundred twenty-one trillion, twenty billion, two thousand, two hundred twelve".