2221122021020 has 24 divisors (see below), whose sum is σ = 5330692850784. Its totient is φ = 761527550016.

The previous prime is 2221122021017. The next prime is 2221122021029. The reversal of 2221122021020 is 201202211222.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221122021020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221122021029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7932578507 + ... + 7932578786.

It is an arithmetic number, because the mean of its divisors is an integer number (222112202116).

Almost surely, 2^{2221122021020} is an apocalyptic number.

2221122021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221122021020 is an abundant number, since it is smaller than the sum of its proper divisors (3109570829764).

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

2221122021020 is a wasteful number, since it uses less digits than its factorization.

2221122021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15865157309 (or 15865157307 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2221122021020 its reverse (201202211222), we get a palindrome (2422324232242).

The spelling of 2221122021020 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, twenty-one thousand, twenty".