102212121221020 has 12 divisors (see below), whose sum is σ = 214645454564184. Its totient is φ = 40884848488400.

The previous prime is 102212121220933. The next prime is 102212121221029. The reversal of 102212121221020 is 20122121212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212121221029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555303030506 + ... + 2555303030545.

It is an arithmetic number, because the mean of its divisors is an integer number (17887121213682).

Almost surely, 2^{102212121221020} is an apocalyptic number.

102212121221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102212121221020 is an abundant number, since it is smaller than the sum of its proper divisors (112433333343164).

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

102212121221020 is a wasteful number, since it uses less digits than its factorization.

102212121221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110606061060 (or 5110606061058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102212121221020 its reverse (20122121212201), we get a palindrome (122334242433221).

The spelling of 102212121221020 in words is "one hundred two trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".