101442431421 has 12 divisors (see below), whose sum is σ = 147085100448. Its totient is φ = 67371144264.

The previous prime is 101442431413. The next prime is 101442431423. The reversal of 101442431421 is 124134244101.

It is not a de Polignac number, because 101442431421 - 2³ = 101442431413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101442431423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21426115 + ... + 21430848.

It is an arithmetic number, because the mean of its divisors is an integer number (12257091704).

Almost surely, 2^101442431421 is an apocalyptic number.

It is an amenable number.

101442431421 is a deficient number, since it is larger than the sum of its proper divisors (45642669027).

101442431421 is a wasteful number, since it uses less digits than its factorization.

101442431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42857232 (or 42857229 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 101442431421 its reverse (124134244101), we get a palindrome (225576675522).

The spelling of 101442431421 in words is "one hundred one billion, four hundred forty-two million, four hundred thirty-one thousand, four hundred twenty-one".