2111211221000 has 64 divisors (see below), whose sum is σ = 5645982026880. Its totient is φ = 723843844800.

The previous prime is 2111211220903. The next prime is 2111211221003. The reversal of 2111211221000 is 1221121112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (2111211221003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150793802 + ... + 150807801.

It is an arithmetic number, because the mean of its divisors is an integer number (88218469170).

Almost surely, 2^{2111211221000} is an apocalyptic number.

2111211221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111211221000 is an abundant number, since it is smaller than the sum of its proper divisors (3534770805880).

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

2111211221000 is a wasteful number, since it uses less digits than its factorization.

2111211221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301601631 (or 301601617 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2111211221000 its reverse (1221121112), we get a palindrome (2112432342112).

It can be divided in two parts, 21112112 and 21000, that added together give a palindrome (21133112).

The spelling of 2111211221000 in words is "two trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand".