10421555111 has 8 divisors (see below), whose sum is σ = 11646261648. Its totient is φ = 9243064000.

The previous prime is 10421555099. The next prime is 10421555143. The reversal of 10421555111 is 11155512401.

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 not a de Polignac number, because 10421555111 - 2¹⁴ = 10421538727 is a prime.

It is a super-2 number, since 2×10421555111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421555171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11553380 + ... + 11554281.

It is an arithmetic number, because the mean of its divisors is an integer number (1455782706).

Almost surely, 2^10421555111 is an apocalyptic number.

10421555111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10421555111 is a deficient number, since it is larger than the sum of its proper divisors (1224706537).

10421555111 is a wasteful number, since it uses less digits than its factorization.

10421555111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23107713.

The product of its (nonzero) digits is 1000, while the sum is 26.

The spelling of 10421555111 in words is "ten billion, four hundred twenty-one million, five hundred fifty-five thousand, one hundred eleven".