2100211220121 has 8 divisors (see below), whose sum is σ = 3200321859264. Its totient is φ = 1200120697200.

The previous prime is 2100211220057. The next prime is 2100211220227. The reversal of 2100211220121 is 1210221120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2100211220121 - 2⁶ = 2100211220057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100211220121.

It is not an unprimeable number, because it can be changed into a prime (2100211220621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50005029030 + ... + 50005029071.

It is an arithmetic number, because the mean of its divisors is an integer number (400040232408).

Almost surely, 2^{2100211220121} is an apocalyptic number.

2100211220121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2100211220121 is a deficient number, since it is larger than the sum of its proper divisors (1100110639143).

2100211220121 is a wasteful number, since it uses less digits than its factorization.

2100211220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100010058111.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2100211220121 its reverse (1210221120012), we get a palindrome (3310432340133).

The spelling of 2100211220121 in words is "two trillion, one hundred billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-one".