101123421 has 16 divisors (see below), whose sum is σ = 156620928. Its totient is φ = 56836800.

The previous prime is 101123411. The next prime is 101123431. The reversal of 101123421 is 124321101.

It is an interprime number because it is at equal distance from previous prime (101123411) and next prime (101123431).

It is not a de Polignac number, because 101123421 - 2⁵ = 101123389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101123421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101123411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38190 + ... + 40751.

It is an arithmetic number, because the mean of its divisors is an integer number (9788808).

Almost surely, 2^101123421 is an apocalyptic number.

It is an amenable number.

101123421 is a deficient number, since it is larger than the sum of its proper divisors (55497507).

101123421 is an equidigital number, since it uses as much as digits as its factorization.

101123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79012.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 101123421 is about 10056.0141706344. The cubic root of 101123421 is about 465.8905675484.

Adding to 101123421 its reverse (124321101), we get a palindrome (225444522).

The spelling of 101123421 in words is "one hundred one million, one hundred twenty-three thousand, four hundred twenty-one".