2142121011 has 4 divisors (see below), whose sum is σ = 2856161352. Its totient is φ = 1428080672.

The previous prime is 2142121001. The next prime is 2142121013. The reversal of 2142121011 is 1101212412.

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

It is a cyclic number.

It is not a de Polignac number, because 2142121011 - 2⁶ = 2142120947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2142121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357020166 + ... + 357020171.

It is an arithmetic number, because the mean of its divisors is an integer number (714040338).

Almost surely, 2^2142121011 is an apocalyptic number.

2142121011 is a deficient number, since it is larger than the sum of its proper divisors (714040341).

2142121011 is an equidigital number, since it uses as much as digits as its factorization.

2142121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714040340.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2142121011 is about 46283.0531728407. The cubic root of 2142121011 is about 1289.0843432996.

Adding to 2142121011 its reverse (1101212412), we get a palindrome (3243333423).

The spelling of 2142121011 in words is "two billion, one hundred forty-two million, one hundred twenty-one thousand, eleven".