221212010112102 has 48 divisors (see below), whose sum is σ = 484107664296672. Its totient is φ = 72996780873600.

The previous prime is 221212010112089. The next prime is 221212010112127. The reversal of 221212010112102 is 201211010212122.

221212010112102 is a `hidden beast` number, since 221 + 21 + 201 + 0 + 11 + 210 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3933498 + ... + 21398514.

It is an arithmetic number, because the mean of its divisors is an integer number (10085576339514).

Almost surely, 2^{221212010112102} is an apocalyptic number.

221212010112102 is an abundant number, since it is smaller than the sum of its proper divisors (262895654184570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212010112102 is a wasteful number, since it uses less digits than its factorization.

221212010112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17472093 (or 17472090 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221212010112102 its reverse (201211010212122), we get a palindrome (422423020324224).

The spelling of 221212010112102 in words is "two hundred twenty-one trillion, two hundred twelve billion, ten million, one hundred twelve thousand, one hundred two".