2121210103111 has 4 divisors (see below), whose sum is σ = 2314047385224. Its totient is φ = 1928372821000.

The previous prime is 2121210103099. The next prime is 2121210103151. The reversal of 2121210103111 is 1113010121212.

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-2121210103111 is a prime.

It is a super-3 number, since 3×2121210103111³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121210103151) 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, 96418641040 + ... + 96418641061.

It is an arithmetic number, because the mean of its divisors is an integer number (578511846306).

Almost surely, 2^{2121210103111} is an apocalyptic number.

2121210103111 is a deficient number, since it is larger than the sum of its proper divisors (192837282113).

2121210103111 is a wasteful number, since it uses less digits than its factorization.

2121210103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192837282112.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 2121210103111 its reverse (1113010121212), we get a palindrome (3234220224323).

The spelling of 2121210103111 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, one hundred three thousand, one hundred eleven".