142121021434 has 16 divisors (see below), whose sum is σ = 243721561536. Its totient is φ = 60887628000.

The previous prime is 142121021407. The next prime is 142121021443. The reversal of 142121021434 is 434120121241.

It is a junction number, because it is equal to n+sod(n) for n = 142121021399 and 142121021408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740427 + ... + 1820254.

It is an arithmetic number, because the mean of its divisors is an integer number (15232597596).

Almost surely, 2^142121021434 is an apocalyptic number.

142121021434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

142121021434 is a deficient number, since it is larger than the sum of its proper divisors (101600540102).

142121021434 is a wasteful number, since it uses less digits than its factorization.

142121021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563541.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 142121021434 its reverse (434120121241), we get a palindrome (576241142675).

The spelling of 142121021434 in words is "one hundred forty-two billion, one hundred twenty-one million, twenty-one thousand, four hundred thirty-four".