121222221022012 has 48 divisors (see below), whose sum is σ = 235602244410624. Its totient is φ = 54566048050800.

The previous prime is 121222221021997. The next prime is 121222221022103. The reversal of 121222221022012 is 210220122222121.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 in 15 ways as a sum of consecutive naturals, for example, 109980814 + ... + 111077557.

It is an arithmetic number, because the mean of its divisors is an integer number (4908380091888).

Almost surely, 2^{121222221022012} is an apocalyptic number.

It is an amenable number.

121222221022012 is a deficient number, since it is larger than the sum of its proper divisors (114380023388612).

121222221022012 is a wasteful number, since it uses less digits than its factorization.

121222221022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221058511 (or 221058487 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121222221022012 its reverse (210220122222121), we get a palindrome (331442343244133).

The spelling of 121222221022012 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, twenty-two thousand, twelve".