20100121111222 has 16 divisors (see below), whose sum is σ = 31934696044320. Its totient is φ = 9455628884608.

The previous prime is 20100121111207. The next prime is 20100121111237. The reversal of 20100121111222 is 22211112100102.

It is an interprime number because it is at equal distance from previous prime (20100121111207) and next prime (20100121111237).

It is a junction number, because it is equal to n+sod(n) for n = 20100121111196 and 20100121111205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101513338 + ... + 101711149.

It is an arithmetic number, because the mean of its divisors is an integer number (1995918502770).

Almost surely, 2^{20100121111222} is an apocalyptic number.

20100121111222 is a deficient number, since it is larger than the sum of its proper divisors (11834574933098).

20100121111222 is a wasteful number, since it uses less digits than its factorization.

20100121111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203227415.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20100121111222 its reverse (22211112100102), we get a palindrome (42311233211324).

The spelling of 20100121111222 in words is "twenty trillion, one hundred billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".