11212021135542 has 8 divisors (see below), whose sum is σ = 22424042271096. Its totient is φ = 3737340378512.

The previous prime is 11212021135541. The next prime is 11212021135559. The reversal of 11212021135542 is 24553112021211.

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

11212021135542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212021135541) 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, 934335094623 + ... + 934335094634.

It is an arithmetic number, because the mean of its divisors is an integer number (2803005283887).

Almost surely, 2^{11212021135542} is an apocalyptic number.

11212021135542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11212021135542 is a wasteful number, since it uses less digits than its factorization.

11212021135542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868670189262.

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 11212021135542 its reverse (24553112021211), we get a palindrome (35765133156753).

The spelling of 11212021135542 in words is "eleven trillion, two hundred twelve billion, twenty-one million, one hundred thirty-five thousand, five hundred forty-two".