101244001421 has 4 divisors (see below), whose sum is σ = 102669973344. Its totient is φ = 99818029500.

The previous prime is 101244001393. The next prime is 101244001471. The reversal of 101244001421 is 124100442101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124100442101 = 61651 ⋅2012951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101244001421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101244001393 and 101244001402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101244001471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712985855 + ... + 712985996.

It is an arithmetic number, because the mean of its divisors is an integer number (25667493336).

Almost surely, 2^101244001421 is an apocalyptic number.

It is an amenable number.

101244001421 is a deficient number, since it is larger than the sum of its proper divisors (1425971923).

101244001421 is an equidigital number, since it uses as much as digits as its factorization.

101244001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425971922.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 101244001421 its reverse (124100442101), we get a palindrome (225344443522).

The spelling of 101244001421 in words is "one hundred one billion, two hundred forty-four million, one thousand, four hundred twenty-one".