2221211131164 has 72 divisors (see below), whose sum is σ = 5823050549680. Its totient is φ = 740356723584.

The previous prime is 2221211131103. The next prime is 2221211131189. The reversal of 2221211131164 is 4611311121222.

2221211131164 is a `hidden beast` number, since 22 + 212 + 111 + 311 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17421792 + ... + 17548824.

Almost surely, 2^{2221211131164} is an apocalyptic number.

It is an amenable number.

2221211131164 is an abundant number, since it is smaller than the sum of its proper divisors (3601839418516).

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

2221211131164 is a wasteful number, since it uses less digits than its factorization.

2221211131164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145041 (or 145027 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

Adding to 2221211131164 its reverse (4611311121222), we get a palindrome (6832522252386).

The spelling of 2221211131164 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, one hundred thirty-one thousand, one hundred sixty-four".