101421025 has 12 divisors (see below), whose sum is σ = 125920512. Its totient is φ = 81034640.

The previous prime is 101420999. The next prime is 101421029. The reversal of 101421025 is 520124101.

It is not a de Polignac number, because 101421025 - 2⁷ = 101420897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101421029) 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, 22512 + ... + 26638.

It is an arithmetic number, because the mean of its divisors is an integer number (10493376).

Almost surely, 2^101421025 is an apocalyptic number.

It is an amenable number.

101421025 is a deficient number, since it is larger than the sum of its proper divisors (24499487).

101421025 is an equidigital number, since it uses as much as digits as its factorization.

101421025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120 (or 5115 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 101421025 is about 10070.8006136553. The cubic root of 101421025 is about 466.3471551570.

Adding to 101421025 its reverse (520124101), we get a palindrome (621545126).

The spelling of 101421025 in words is "one hundred one million, four hundred twenty-one thousand, twenty-five".