1010121201 has 36 divisors (see below), whose sum is σ = 1518969972. Its totient is φ = 646356672.

The previous prime is 1010121197. The next prime is 1010121271. The reversal of 1010121201 is 1021210101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 626000400 + 384120801 = 25020^2 + 19599^2 .

It is not a de Polignac number, because 1010121201 - 2² = 1010121197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010121271) 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 35 ways as a sum of consecutive naturals, for example, 6433815 + ... + 6433971.

Almost surely, 2^1010121201 is an apocalyptic number.

It is an amenable number.

1010121201 is a deficient number, since it is larger than the sum of its proper divisors (508848771).

1010121201 is a wasteful number, since it uses less digits than its factorization.

1010121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1010121201 is about 31782.4039525018. The cubic root of 1010121201 is about 1003.3624151593.

Adding to 1010121201 its reverse (1021210101), we get a palindrome (2031331302).

Subtracting 1010121201 from its reverse (1021210101), we obtain a square (11088900 = 3330²).

The spelling of 1010121201 in words is "one billion, ten million, one hundred twenty-one thousand, two hundred one".