11012021001 has 12 divisors (see below), whose sum is σ = 15920087040. Its totient is φ = 7334962200.

The previous prime is 11012020991. The next prime is 11012021017. The reversal of 11012021001 is 10012021011.

It is a happy number.

It is not a de Polignac number, because 11012021001 - 2⁹ = 11012020489 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (11012021701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521161 + ... + 541878.

It is an arithmetic number, because the mean of its divisors is an integer number (1326673920).

Almost surely, 2^11012021001 is an apocalyptic number.

It is an amenable number.

11012021001 is a deficient number, since it is larger than the sum of its proper divisors (4908066039).

11012021001 is a wasteful number, since it uses less digits than its factorization.

11012021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064196 (or 1064193 counting only the distinct ones).

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

Adding to 11012021001 its reverse (10012021011), we get a palindrome (21024042012).

The spelling of 11012021001 in words is "eleven billion, twelve million, twenty-one thousand, one".