2221121121011 has 4 divisors (see below), whose sum is σ = 2391976591872. Its totient is φ = 2050265650152.

The previous prime is 2221121120993. The next prime is 2221121121017. The reversal of 2221121121011 is 1101211211222.

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 2221121121011 - 2²⁶ = 2221054012147 is a prime.

It is a super-2 number, since 2×2221121121011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221121121017) 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, 85427735411 + ... + 85427735436.

It is an arithmetic number, because the mean of its divisors is an integer number (597994147968).

Almost surely, 2^{2221121121011} is an apocalyptic number.

2221121121011 is a deficient number, since it is larger than the sum of its proper divisors (170855470861).

2221121121011 is a wasteful number, since it uses less digits than its factorization.

2221121121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170855470860.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2221121121011 its reverse (1101211211222), we get a palindrome (3322332332233).

The spelling of 2221121121011 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".