12201001011 has 12 divisors (see below), whose sum is σ = 17821688040. Its totient is φ = 8042606880.

The previous prime is 12201001003. The next prime is 12201001013. The reversal of 12201001011 is 11010010221.

It is a happy number.

It is not a de Polignac number, because 12201001011 - 2³ = 12201001003 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 = 12201000984 and 12201001002.

It is not an unprimeable number, because it can be changed into a prime (12201001013) 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, 7615305 + ... + 7616906.

It is an arithmetic number, because the mean of its divisors is an integer number (1485140670).

Almost surely, 2^12201001011 is an apocalyptic number.

12201001011 is a deficient number, since it is larger than the sum of its proper divisors (5620687029).

12201001011 is a wasteful number, since it uses less digits than its factorization.

12201001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15232306 (or 15232303 counting only the distinct ones).

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

Adding to 12201001011 its reverse (11010010221), we get a palindrome (23211011232).

The spelling of 12201001011 in words is "twelve billion, two hundred one million, one thousand, eleven".