101022121 has 4 divisors (see below), whose sum is σ = 101665732. Its totient is φ = 100378512.

The previous prime is 101022083. The next prime is 101022169. The reversal of 101022121 is 121220101.

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 20830096 + 80192025 = 4564^2 + 8955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101022098 and 101022107.

It is not an unprimeable number, because it can be changed into a prime (101022821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321570 + ... + 321883.

It is an arithmetic number, because the mean of its divisors is an integer number (25416433).

Almost surely, 2^101022121 is an apocalyptic number.

It is an amenable number.

101022121 is a deficient number, since it is larger than the sum of its proper divisors (643611).

101022121 is an equidigital number, since it uses as much as digits as its factorization.

101022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643610.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 101022121 is about 10050.9761217506. The cubic root of 101022121 is about 465.7349475419.

Adding to 101022121 its reverse (121220101), we get a palindrome (222242222).

The spelling of 101022121 in words is "one hundred one million, twenty-two thousand, one hundred twenty-one".