121400015142 has 64 divisors (see below), whose sum is σ = 278957781504. Its totient is φ = 34501904640.

The previous prime is 121400015141. The next prime is 121400015179. The reversal of 121400015142 is 241510004121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400015141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24607308 + ... + 24612240.

It is an arithmetic number, because the mean of its divisors is an integer number (4358715336).

Almost surely, 2^121400015142 is an apocalyptic number.

121400015142 is an abundant number, since it is smaller than the sum of its proper divisors (157557766362).

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

121400015142 is a wasteful number, since it uses less digits than its factorization.

121400015142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7933.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 121400015142 its reverse (241510004121), we get a palindrome (362910019263).

The spelling of 121400015142 in words is "one hundred twenty-one billion, four hundred million, fifteen thousand, one hundred forty-two".