101230001021 has 4 divisors (see below), whose sum is σ = 102125841852. Its totient is φ = 100334160192.

The previous prime is 101230000999. The next prime is 101230001051. The reversal of 101230001021 is 120100032101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1003305625 + 100226695396 = 31675^2 + 316586^2 .

It is a cyclic number.

It is not a de Polignac number, because 101230001021 - 2⁶ = 101230000957 is a prime.

It is a super-2 number, since 2×101230001021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101230000993 and 101230001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101230001051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447920246 + ... + 447920471.

It is an arithmetic number, because the mean of its divisors is an integer number (25531460463).

Almost surely, 2^101230001021 is an apocalyptic number.

It is an amenable number.

101230001021 is a deficient number, since it is larger than the sum of its proper divisors (895840831).

101230001021 is an equidigital number, since it uses as much as digits as its factorization.

101230001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895840830.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 101230001021 its reverse (120100032101), we get a palindrome (221330033122).

The spelling of 101230001021 in words is "one hundred one billion, two hundred thirty million, one thousand, twenty-one".