2102220121220 has 48 divisors (see below), whose sum is σ = 4433546831616. Its totient is φ = 837294624000.

The previous prime is 2102220121201. The next prime is 2102220121241. The reversal of 2102220121220 is 221210222012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9215135 + ... + 9440505.

It is an arithmetic number, because the mean of its divisors is an integer number (92365558992).

Almost surely, 2^{2102220121220} is an apocalyptic number.

2102220121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102220121220 is an abundant number, since it is smaller than the sum of its proper divisors (2331326710396).

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

2102220121220 is a wasteful number, since it uses less digits than its factorization.

2102220121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227372 (or 227370 counting only the distinct ones).

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

Adding to 2102220121220 its reverse (221210222012), we get a palindrome (2323430343232).

The spelling of 2102220121220 in words is "two trillion, one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty".