222121000111020 has 24 divisors (see below), whose sum is σ = 621938800311024. Its totient is φ = 59232266696256.

The previous prime is 222121000111007. The next prime is 222121000111063. The reversal of 222121000111020 is 20111000121222.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1851008334199 + ... + 1851008334318.

It is an arithmetic number, because the mean of its divisors is an integer number (25914116679626).

Almost surely, 2^{222121000111020} is an apocalyptic number.

222121000111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121000111020 is an abundant number, since it is smaller than the sum of its proper divisors (399817800200004).

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

222121000111020 is a wasteful number, since it uses less digits than its factorization.

222121000111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702016668529 (or 3702016668527 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222121000111020 its reverse (20111000121222), we get a palindrome (242232000232242).

The spelling of 222121000111020 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred eleven thousand, twenty".