2011121210021 has 8 divisors (see below), whose sum is σ = 2507371898304. Its totient is φ = 1567107436320.

The previous prime is 2011121209991. The next prime is 2011121210039. The reversal of 2011121210021 is 1200121211102.

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

It is a cyclic number.

It is not a de Polignac number, because 2011121210021 - 2¹⁰ = 2011121208997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011121209978 and 2011121210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011121210051) 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, 13059228560 + ... + 13059228713.

It is an arithmetic number, because the mean of its divisors is an integer number (313421487288).

Almost surely, 2^{2011121210021} is an apocalyptic number.

It is an amenable number.

2011121210021 is a deficient number, since it is larger than the sum of its proper divisors (496250688283).

2011121210021 is a wasteful number, since it uses less digits than its factorization.

2011121210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26118457291.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011121210021 its reverse (1200121211102), we get a palindrome (3211242421123).

The spelling of 2011121210021 in words is "two trillion, eleven billion, one hundred twenty-one million, two hundred ten thousand, twenty-one".