111142001421 has 16 divisors (see below), whose sum is σ = 179623437120. Its totient is φ = 67358788560.

The previous prime is 111142001417. The next prime is 111142001423. The reversal of 111142001421 is 124100241111.

It is not a de Polignac number, because 111142001421 - 2² = 111142001417 is a prime.

It is a super-3 number, since 3×111142001421³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111142001394 and 111142001403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111142001423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187107450 + ... + 187108043.

It is an arithmetic number, because the mean of its divisors is an integer number (11226464820).

Almost surely, 2^111142001421 is an apocalyptic number.

111142001421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111142001421 is a deficient number, since it is larger than the sum of its proper divisors (68481435699).

111142001421 is a wasteful number, since it uses less digits than its factorization.

111142001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374215513 (or 374215507 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111142001421 its reverse (124100241111), we get a palindrome (235242242532).

The spelling of 111142001421 in words is "one hundred eleven billion, one hundred forty-two million, one thousand, four hundred twenty-one".