2100121102222 has 32 divisors (see below), whose sum is σ = 3700999260000. Its totient is φ = 881149086720.

The previous prime is 2100121102199. The next prime is 2100121102223. The reversal of 2100121102222 is 2222011210012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2100121102196 and 2100121102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100121102223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22969654 + ... + 23060902.

It is an arithmetic number, because the mean of its divisors is an integer number (115656226875).

Almost surely, 2^{2100121102222} is an apocalyptic number.

2100121102222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2100121102222 is a deficient number, since it is larger than the sum of its proper divisors (1600878157778).

2100121102222 is a wasteful number, since it uses less digits than its factorization.

2100121102222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171748.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2100121102222 its reverse (2222011210012), we get a palindrome (4322132312234).

The spelling of 2100121102222 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty-two".