2100121111012 has 12 divisors (see below), whose sum is σ = 3737503672560. Its totient is φ = 1032262918856.

The previous prime is 2100121110979. The next prime is 2100121111037. The reversal of 2100121111012 is 2101111210012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2100121110983 and 2100121111001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4449408898 + ... + 4449409369.

It is an arithmetic number, because the mean of its divisors is an integer number (311458639380).

Almost surely, 2^{2100121111012} is an apocalyptic number.

It is an amenable number.

2100121111012 is a deficient number, since it is larger than the sum of its proper divisors (1637382561548).

2100121111012 is a wasteful number, since it uses less digits than its factorization.

2100121111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8898818330 (or 8898818328 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2100121111012 its reverse (2101111210012), we get a palindrome (4201232321024).

The spelling of 2100121111012 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred eleven thousand, twelve".