2121003031111 has 16 divisors (see below), whose sum is σ = 2279400609600. Its totient is φ = 1966541068800.

The previous prime is 2121003031067. The next prime is 2121003031157. The reversal of 2121003031111 is 1111303001212.

It is a happy number.

It is not a de Polignac number, because 2121003031111 - 2²¹ = 2121000933959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121003035111) 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, 2762076 + ... + 3445441.

It is an arithmetic number, because the mean of its divisors is an integer number (142462538100).

Almost surely, 2^{2121003031111} is an apocalyptic number.

2121003031111 is a deficient number, since it is larger than the sum of its proper divisors (158397578489).

2121003031111 is a wasteful number, since it uses less digits than its factorization.

2121003031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207834.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 2121003031111 its reverse (1111303001212), we get a palindrome (3232306032323).

The spelling of 2121003031111 in words is "two trillion, one hundred twenty-one billion, three million, thirty-one thousand, one hundred eleven".