10221201212212 has 6 divisors (see below), whose sum is σ = 17887102121378. Its totient is φ = 5110600606104.

The previous prime is 10221201212179. The next prime is 10221201212219. The reversal of 10221201212212 is 21221210212201.

It can be written as a sum of positive squares in only one way, i.e., 9910432871056 + 310768341156 = 3148084^2 + 557466^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10221201212212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221201212219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277650151523 + ... + 1277650151530.

Almost surely, 2^{10221201212212} is an apocalyptic number.

It is an amenable number.

10221201212212 is a deficient number, since it is larger than the sum of its proper divisors (7665900909166).

10221201212212 is a wasteful number, since it uses less digits than its factorization.

10221201212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555300303057 (or 2555300303055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10221201212212 its reverse (21221210212201), we get a palindrome (31442411424413).

The spelling of 10221201212212 in words is "ten trillion, two hundred twenty-one billion, two hundred one million, two hundred twelve thousand, two hundred twelve".