2011121021004 has 24 divisors (see below), whose sum is σ = 4694137896000. Its totient is φ = 670156219344.

The previous prime is 2011121020981. The next prime is 2011121021009. The reversal of 2011121021004 is 4001201211102.

It is a super-2 number, since 2×2011121021004² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2011121021009) 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, 27143254 + ... + 27217245.

It is an arithmetic number, because the mean of its divisors is an integer number (195589079000).

Almost surely, 2^{2011121021004} is an apocalyptic number.

It is an amenable number.

2011121021004 is an abundant number, since it is smaller than the sum of its proper divisors (2683016874996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011121021004 is a wasteful number, since it uses less digits than its factorization.

2011121021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54363589 (or 54363587 counting only the distinct ones).

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

Adding to 2011121021004 its reverse (4001201211102), we get a palindrome (6012322232106).

The spelling of 2011121021004 in words is "two trillion, eleven billion, one hundred twenty-one million, twenty-one thousand, four".