1012001211 has 24 divisors (see below), whose sum is σ = 1666828800. Its totient is φ = 586135296.

The previous prime is 1012001201. The next prime is 1012001257. The reversal of 1012001211 is 1121002101.

It is a happy number.

It is not a de Polignac number, because 1012001211 - 2⁶ = 1012001147 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1012001193 and 1012001202.

It is not an unprimeable number, because it can be changed into a prime (1012001201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252411 + ... + 256388.

It is an arithmetic number, because the mean of its divisors is an integer number (69451200).

Almost surely, 2^1012001211 is an apocalyptic number.

1012001211 is a deficient number, since it is larger than the sum of its proper divisors (654827589).

1012001211 is a wasteful number, since it uses less digits than its factorization.

1012001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508835 (or 508832 counting only the distinct ones).

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

The square root of 1012001211 is about 31811.9664748975. The cubic root of 1012001211 is about 1003.9845062899.

Adding to 1012001211 its reverse (1121002101), we get a palindrome (2133003312).

The spelling of 1012001211 in words is "one billion, twelve million, one thousand, two hundred eleven".