10221111122212 has 6 divisors (see below), whose sum is σ = 17886944463878. Its totient is φ = 5110555561104.

The previous prime is 10221111122171. The next prime is 10221111122263. The reversal of 10221111122212 is 21222111112201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7807419518976 + 2413691603236 = 2794176^2 + 1553606^2 .

It is a super-2 number, since 2×10221111122212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10221111122212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277638890273 + ... + 1277638890280.

Almost surely, 2^{10221111122212} is an apocalyptic number.

It is an amenable number.

10221111122212 is a deficient number, since it is larger than the sum of its proper divisors (7665833341666).

10221111122212 is a wasteful number, since it uses less digits than its factorization.

10221111122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555277780557 (or 2555277780555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 10221111122212 its reverse (21222111112201), we get a palindrome (31443222234413).

The spelling of 10221111122212 in words is "ten trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twelve".