11122121212021 has 8 divisors (see below), whose sum is σ = 11143257776000. Its totient is φ = 11100987582048.

The previous prime is 11122121211983. The next prime is 11122121212043. The reversal of 11122121212021 is 12021212122111.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11122121212021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11122121212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122121212721) 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, 6931225 + ... + 8383681.

It is an arithmetic number, because the mean of its divisors is an integer number (1392907222000).

Almost surely, 2^{11122121212021} is an apocalyptic number.

It is an amenable number.

11122121212021 is a deficient number, since it is larger than the sum of its proper divisors (21136563979).

11122121212021 is a wasteful number, since it uses less digits than its factorization.

11122121212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467003.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11122121212021 its reverse (12021212122111), we get a palindrome (23143333334132).

The spelling of 11122121212021 in words is "eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, twenty-one".