11154661421421 has 8 divisors (see below), whose sum is σ = 16997579308864. Its totient is φ = 6374092240800.

The previous prime is 11154661421413. The next prime is 11154661421443. The reversal of 11154661421421 is 12412416645111.

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

It is not a de Polignac number, because 11154661421421 - 2³ = 11154661421413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11154661421421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11154661421411) 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, 265587176680 + ... + 265587176721.

It is an arithmetic number, because the mean of its divisors is an integer number (2124697413608).

Almost surely, 2^{11154661421421} is an apocalyptic number.

It is an amenable number.

11154661421421 is a deficient number, since it is larger than the sum of its proper divisors (5842917887443).

11154661421421 is an equidigital number, since it uses as much as digits as its factorization.

11154661421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531174353411.

The product of its digits is 46080, while the sum is 39.

The spelling of 11154661421421 in words is "eleven trillion, one hundred fifty-four billion, six hundred sixty-one million, four hundred twenty-one thousand, four hundred twenty-one".