2121110220111 has 8 divisors (see below), whose sum is σ = 2838140413440. Its totient is φ = 1409076753432.

The previous prime is 2121110220091. The next prime is 2121110220121. The reversal of 2121110220111 is 1110220111212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121110220111 - 2⁷ = 2121110219983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121110220121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1249180671 + ... + 1249182368.

It is an arithmetic number, because the mean of its divisors is an integer number (354767551680).

Almost surely, 2^{2121110220111} is an apocalyptic number.

2121110220111 is a deficient number, since it is larger than the sum of its proper divisors (717030193329).

2121110220111 is a wasteful number, since it uses less digits than its factorization.

2121110220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498363325.

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

Adding to 2121110220111 its reverse (1110220111212), we get a palindrome (3231330331323).

It can be divided in two parts, 212 and 1110220111, that multiplied together give a palindrome (235366663532).

The spelling of 2121110220111 in words is "two trillion, one hundred twenty-one billion, one hundred ten million, two hundred twenty thousand, one hundred eleven".