1012122101 has 4 divisors (see below), whose sum is σ = 1013203212. Its totient is φ = 1011040992.

The previous prime is 1012122091. The next prime is 1012122103. The reversal of 1012122101 is 1012212101.

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 235162225 + 776959876 = 15335^2 + 27874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012122101 is a prime.

It is a super-2 number, since 2×1012122101² = 2048782294665308402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012122103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539150 + ... + 541023.

It is an arithmetic number, because the mean of its divisors is an integer number (253300803).

Almost surely, 2^1012122101 is an apocalyptic number.

It is an amenable number.

1012122101 is a deficient number, since it is larger than the sum of its proper divisors (1081111).

1012122101 is an equidigital number, since it uses as much as digits as its factorization.

1012122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081110.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1012122101 is about 31813.8664893156. The cubic root of 1012122101 is about 1004.0244821493.

Adding to 1012122101 its reverse (1012212101), we get a palindrome (2024334202).

Subtracting 1012122101 from its reverse (1012212101), we obtain a square (90000 = 300²).

The spelling of 1012122101 in words is "one billion, twelve million, one hundred twenty-two thousand, one hundred one".