101421144434 has 4 divisors (see below), whose sum is σ = 152131716654. Its totient is φ = 50710572216.

The previous prime is 101421144421. The next prime is 101421144439. The reversal of 101421144434 is 434441124101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101298975625 + 122168809 = 318275^2 + 11053^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101421144397 and 101421144406.

It is not an unprimeable number, because it can be changed into a prime (101421144439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25355286107 + ... + 25355286110.

Almost surely, 2^101421144434 is an apocalyptic number.

101421144434 is a deficient number, since it is larger than the sum of its proper divisors (50710572220).

101421144434 is an equidigital number, since it uses as much as digits as its factorization.

101421144434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50710572219.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 101421144434 its reverse (434441124101), we get a palindrome (535862268535).

The spelling of 101421144434 in words is "one hundred one billion, four hundred twenty-one million, one hundred forty-four thousand, four hundred thirty-four".