221001101010212 has 6 divisors (see below), whose sum is σ = 386751926767878. Its totient is φ = 110500550505104.

The previous prime is 221001101010191. The next prime is 221001101010271. The reversal of 221001101010212 is 212010101100122.

It can be written as a sum of positive squares in only one way, i.e., 160202028524836 + 60799072485376 = 12657094^2 + 7797376^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625137626273 + ... + 27625137626280.

It is an arithmetic number, because the mean of its divisors is an integer number (64458654461313).

Almost surely, 2^{221001101010212} is an apocalyptic number.

It is an amenable number.

221001101010212 is a deficient number, since it is larger than the sum of its proper divisors (165750825757666).

221001101010212 is a wasteful number, since it uses less digits than its factorization.

221001101010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55250275252557 (or 55250275252555 counting only the distinct ones).

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

Adding to 221001101010212 its reverse (212010101100122), we get a palindrome (433011202110334).

The spelling of 221001101010212 in words is "two hundred twenty-one trillion, one billion, one hundred one million, ten thousand, two hundred twelve".