1001212201 has 18 divisors (see below), whose sum is σ = 1161526506. Its totient is φ = 862250400.

The previous prime is 1001212181. The next prime is 1001212217. The reversal of 1001212201 is 1022121001.

It can be written as a sum of positive squares in only one way, i.e., 843960601 + 157251600 = 29051^2 + 12540^2 .

It is not a de Polignac number, because 1001212201 - 2¹⁷ = 1001081129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001212231) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32221 + ... + 55141.

Almost surely, 2^1001212201 is an apocalyptic number.

1001212201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001212201 is a deficient number, since it is larger than the sum of its proper divisors (160314305).

1001212201 is a wasteful number, since it uses less digits than its factorization.

1001212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22981 (or 22951 counting only the distinct ones).

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

The square root of 1001212201 is about 31641.9373774742. The cubic root of 1001212201 is about 1000.4039038397.

Adding to 1001212201 its reverse (1022121001), we get a palindrome (2023333202).

It can be divided in two parts, 100 and 1212201, that multiplied together give a square (121220100 = 11010²).

The spelling of 1001212201 in words is "one billion, one million, two hundred twelve thousand, two hundred one".