2100121102011 has 4 divisors (see below), whose sum is σ = 2800161469352. Its totient is φ = 1400080734672.

The previous prime is 2100121101997. The next prime is 2100121102099. The reversal of 2100121102011 is 1102011210012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2100121102011 - 2¹¹ = 2100121099963 is a prime.

It is a super-2 number, since 2×2100121102011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100121102111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350020183666 + ... + 350020183671.

It is an arithmetic number, because the mean of its divisors is an integer number (700040367338).

Almost surely, 2^{2100121102011} is an apocalyptic number.

2100121102011 is a deficient number, since it is larger than the sum of its proper divisors (700040367341).

2100121102011 is an equidigital number, since it uses as much as digits as its factorization.

2100121102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700040367340.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2100121102011 its reverse (1102011210012), we get a palindrome (3202132312023).

It can be divided in two parts, 210012 and 1102011, that multiplied together give a palindrome (231435534132).

The spelling of 2100121102011 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred two thousand, eleven".