221002102012212 has 18 divisors (see below), whose sum is σ = 558644202308738. Its totient is φ = 73667367337392.

The previous prime is 221002102012193. The next prime is 221002102012247. The reversal of 221002102012212 is 212210201200122.

It is a happy number.

221002102012212 is a `hidden beast` number, since 2 + 210 + 0 + 210 + 20 + 1 + 221 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 149419232848656 + 71582869163556 = 12223716^2 + 8460666^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 3069473639023 + ... + 3069473639094.

Almost surely, 2^{221002102012212} is an apocalyptic number.

It is an amenable number.

221002102012212 is an abundant number, since it is smaller than the sum of its proper divisors (337642100296526).

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

221002102012212 is a wasteful number, since it uses less digits than its factorization.

221002102012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6138947278127 (or 6138947278122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221002102012212 its reverse (212210201200122), we get a palindrome (433212303212334).

The spelling of 221002102012212 in words is "two hundred twenty-one trillion, two billion, one hundred two million, twelve thousand, two hundred twelve".