2102012121111 has 16 divisors (see below), whose sum is σ = 3208617348864. Its totient is φ = 1199068061184.

The previous prime is 2102012121091. The next prime is 2102012121149. The reversal of 2102012121111 is 1111212102012.

It is a happy number.

It is not a de Polignac number, because 2102012121111 - 2⁷ = 2102012120983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102012121611) 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, 86726025 + ... + 86750258.

It is an arithmetic number, because the mean of its divisors is an integer number (200538584304).

Almost surely, 2^{2102012121111} is an apocalyptic number.

2102012121111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2102012121111 is a deficient number, since it is larger than the sum of its proper divisors (1106605227753).

2102012121111 is a wasteful number, since it uses less digits than its factorization.

2102012121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173476870.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2102012121111 its reverse (1111212102012), we get a palindrome (3213224223123).

The spelling of 2102012121111 in words is "two trillion, one hundred two billion, twelve million, one hundred twenty-one thousand, one hundred eleven".