2100122121222 has 32 divisors (see below), whose sum is σ = 4941463816800. Its totient is φ = 658861841664.

The previous prime is 2100122121157. The next prime is 2100122121241. The reversal of 2100122121222 is 2221212210012.

It is a happy number.

2100122121222 is a `hidden beast` number, since 210 + 0 + 1 + 221 + 212 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2100122121195 and 2100122121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143856447 + ... + 1143858282.

It is an arithmetic number, because the mean of its divisors is an integer number (154420744275).

Almost surely, 2^{2100122121222} is an apocalyptic number.

2100122121222 is an abundant number, since it is smaller than the sum of its proper divisors (2841341695578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100122121222 is a wasteful number, since it uses less digits than its factorization.

2100122121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287714757 (or 2287714751 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2100122121222 its reverse (2221212210012), we get a palindrome (4321334331234).

The spelling of 2100122121222 in words is "two trillion, one hundred billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".