2121011212011 has 4 divisors (see below), whose sum is σ = 2828014949352. Its totient is φ = 1414007474672.

The previous prime is 2121011211997. The next prime is 2121011212037. The reversal of 2121011212011 is 1102121101212.

It is a happy number.

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 2121011212011 - 2⁷ = 2121011211883 is a prime.

It is a super-2 number, since 2×2121011212011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121011212091) 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, 353501868666 + ... + 353501868671.

It is an arithmetic number, because the mean of its divisors is an integer number (707003737338).

Almost surely, 2^{2121011212011} is an apocalyptic number.

2121011212011 is a deficient number, since it is larger than the sum of its proper divisors (707003737341).

2121011212011 is an equidigital number, since it uses as much as digits as its factorization.

2121011212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707003737340.

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

Adding to 2121011212011 its reverse (1102121101212), we get a palindrome (3223132313223).

The spelling of 2121011212011 in words is "two trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, eleven".