211223001000 has 128 divisors (see below), whose sum is σ = 718926399360. Its totient is φ = 51205568000.

The previous prime is 211223000999. The next prime is 211223001001. The reversal of 211223001000 is 100322112.

It is an interprime number because it is at equal distance from previous prime (211223000999) and next prime (211223001001).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (211223001001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3167349 + ... + 3233348.

It is an arithmetic number, because the mean of its divisors is an integer number (5616612495).

Almost surely, 2^211223001000 is an apocalyptic number.

211223001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223001000 is an abundant number, since it is smaller than the sum of its proper divisors (507703398360).

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

211223001000 is a wasteful number, since it uses less digits than its factorization.

211223001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6400732 (or 6400718 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 211223001000 its reverse (100322112), we get a palindrome (211323323112).

The spelling of 211223001000 in words is "two hundred eleven billion, two hundred twenty-three million, one thousand".