2121010102111 has 4 divisors (see below), whose sum is σ = 2166137976672. Its totient is φ = 2075882227552.

The previous prime is 2121010102051. The next prime is 2121010102157. The reversal of 2121010102111 is 1112010101212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121010102111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121010102091 and 2121010102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121010102171) 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, 22563937210 + ... + 22563937303.

It is an arithmetic number, because the mean of its divisors is an integer number (541534494168).

Almost surely, 2^{2121010102111} is an apocalyptic number.

2121010102111 is a deficient number, since it is larger than the sum of its proper divisors (45127874561).

2121010102111 is an equidigital number, since it uses as much as digits as its factorization.

2121010102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45127874560.

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

Adding to 2121010102111 its reverse (1112010101212), we get a palindrome (3233020203323).

The spelling of 2121010102111 in words is "two trillion, one hundred twenty-one billion, ten million, one hundred two thousand, one hundred eleven".