15454142121 has 16 divisors (see below), whose sum is σ = 22786683840. Its totient is φ = 9237841920.

The previous prime is 15454142117. The next prime is 15454142161. The reversal of 15454142121 is 12124145451.

It is not a de Polignac number, because 15454142121 - 2² = 15454142117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15454142161) 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 15 ways as a sum of consecutive naturals, for example, 3205176 + ... + 3209993.

It is an arithmetic number, because the mean of its divisors is an integer number (1424167740).

Almost surely, 2^15454142121 is an apocalyptic number.

15454142121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15454142121 is a deficient number, since it is larger than the sum of its proper divisors (7332541719).

15454142121 is a wasteful number, since it uses less digits than its factorization.

15454142121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415256.

The product of its digits is 6400, while the sum is 30.

Adding to 15454142121 its reverse (12124145451), we get a palindrome (27578287572).

The spelling of 15454142121 in words is "fifteen billion, four hundred fifty-four million, one hundred forty-two thousand, one hundred twenty-one".