222121210121012 has 6 divisors (see below), whose sum is σ = 388712117711778. Its totient is φ = 111060605060504.

The previous prime is 222121210120987. The next prime is 222121210121023. The reversal of 222121210121012 is 210121012121222.

It can be written as a sum of positive squares in only one way, i.e., 214318942212496 + 7802267908516 = 14639636^2 + 2793254^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765151265123 + ... + 27765151265130.

It is an arithmetic number, because the mean of its divisors is an integer number (64785352951963).

Almost surely, 2^{222121210121012} is an apocalyptic number.

It is an amenable number.

222121210121012 is a deficient number, since it is larger than the sum of its proper divisors (166590907590766).

222121210121012 is a wasteful number, since it uses less digits than its factorization.

222121210121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55530302530257 (or 55530302530255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222121210121012 its reverse (210121012121222), we get a palindrome (432242222242234).

It can be divided in two parts, 222121210 and 121012, that added together give a palindrome (222242222).

The spelling of 222121210121012 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, twelve".