101020231 has 4 divisors (see below), whose sum is σ = 108791032. Its totient is φ = 93249432.

The previous prime is 101020229. The next prime is 101020243. The reversal of 101020231 is 132020101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132020101 = 5273 ⋅25037.

It is a cyclic number.

It is not a de Polignac number, because 101020231 - 2¹ = 101020229 is a prime.

It is a super-2 number, since 2×101020231² = 20410174142586722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101027231) 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, 3885381 + ... + 3885406.

It is an arithmetic number, because the mean of its divisors is an integer number (27197758).

Almost surely, 2^101020231 is an apocalyptic number.

101020231 is a deficient number, since it is larger than the sum of its proper divisors (7770801).

101020231 is an equidigital number, since it uses as much as digits as its factorization.

101020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770800.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 101020231 is about 10050.8821005920. The cubic root of 101020231 is about 465.7320430805.

Adding to 101020231 its reverse (132020101), we get a palindrome (233040332).

The spelling of 101020231 in words is "one hundred one million, twenty thousand, two hundred thirty-one".