11212001000 has 32 divisors (see below), whose sum is σ = 26236084680. Its totient is φ = 4484800000.

The previous prime is 11212000993. The next prime is 11212001089. The reversal of 11212001000 is 10021211.

It can be written as a sum of positive squares in 4 ways, for example, as 729108004 + 10482892996 = 27002^2 + 102386^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5605001 + ... + 5607000.

Almost surely, 2^11212001000 is an apocalyptic number.

11212001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212001000 is an abundant number, since it is smaller than the sum of its proper divisors (15024083680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11212001000 is a wasteful number, since it uses less digits than its factorization.

11212001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212022 (or 11212008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11212001000 its reverse (10021211), we get a palindrome (11222022211).

The spelling of 11212001000 in words is "eleven billion, two hundred twelve million, one thousand".