20121102121222 has 48 divisors (see below), whose sum is σ = 31412704626576. Its totient is φ = 9665634484800.

The previous prime is 20121102121201. The next prime is 20121102121231. The reversal of 20121102121222 is 22212120112102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121102121222.

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, 204157468 + ... + 204256000.

It is an arithmetic number, because the mean of its divisors is an integer number (654431346387).

Almost surely, 2^{20121102121222} is an apocalyptic number.

20121102121222 is a deficient number, since it is larger than the sum of its proper divisors (11291602505354).

20121102121222 is a wasteful number, since it uses less digits than its factorization.

20121102121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99365 (or 99334 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20121102121222 its reverse (22212120112102), we get a palindrome (42333222233324).

The spelling of 20121102121222 in words is "twenty trillion, one hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-two".