2101121211 has 16 divisors (see below), whose sum is σ = 3205119744. Its totient is φ = 1199361504.

The previous prime is 2101121207. The next prime is 2101121237. The reversal of 2101121211 is 1121211012.

It is not a de Polignac number, because 2101121211 - 2² = 2101121207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101121291) 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, 32940 + ... + 72713.

It is an arithmetic number, because the mean of its divisors is an integer number (200319984).

Almost surely, 2^2101121211 is an apocalyptic number.

2101121211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2101121211 is a deficient number, since it is larger than the sum of its proper divisors (1103998533).

2101121211 is a wasteful number, since it uses less digits than its factorization.

2101121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106610.

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

The square root of 2101121211 is about 45837.9887320550. The cubic root of 2101121211 is about 1280.8070291133.

Adding to 2101121211 its reverse (1121211012), we get a palindrome (3222332223).

The spelling of 2101121211 in words is "two billion, one hundred one million, one hundred twenty-one thousand, two hundred eleven".