101420421 has 4 divisors (see below), whose sum is σ = 135227232. Its totient is φ = 67613612.

The previous prime is 101420411. The next prime is 101420443. The reversal of 101420421 is 124024101.

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.

It is a cyclic number.

It is not a de Polignac number, because 101420421 - 2¹⁵ = 101387653 is a prime.

It is a super-2 number, since 2×101420421² = 20572203591634482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101420421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101420401) 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, 16903401 + ... + 16903406.

It is an arithmetic number, because the mean of its divisors is an integer number (33806808).

Almost surely, 2^101420421 is an apocalyptic number.

It is an amenable number.

101420421 is a deficient number, since it is larger than the sum of its proper divisors (33806811).

101420421 is an equidigital number, since it uses as much as digits as its factorization.

101420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33806810.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 101420421 is about 10070.7706259253. The cubic root of 101420421 is about 466.3462293981.

Adding to 101420421 its reverse (124024101), we get a palindrome (225444522).

The spelling of 101420421 in words is "one hundred one million, four hundred twenty thousand, four hundred twenty-one".