11011021212021 has 8 divisors (see below), whose sum is σ = 14681460349920. Its totient is φ = 7340631441072.

The previous prime is 11011021212017. The next prime is 11011021212071. The reversal of 11011021212021 is 12021212011011.

It is a happy number.

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

It is not a de Polignac number, because 11011021212021 - 2² = 11011021212017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011021212001) 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, 11818126 + ... + 12715743.

It is an arithmetic number, because the mean of its divisors is an integer number (1835182543740).

Almost surely, 2^{11011021212021} is an apocalyptic number.

It is an amenable number.

11011021212021 is a deficient number, since it is larger than the sum of its proper divisors (3670439137899).

11011021212021 is a wasteful number, since it uses less digits than its factorization.

11011021212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24683475.

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

Adding to 11011021212021 its reverse (12021212011011), we get a palindrome (23032233223032).

The spelling of 11011021212021 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twelve thousand, twenty-one".