102011221212020 has 24 divisors (see below), whose sum is σ = 214237914664200. Its totient is φ = 40801755128832.

The previous prime is 102011221211987. The next prime is 102011221212023. The reversal of 102011221212020 is 20212122110201.

It can be written as a sum of positive squares in 4 ways, for example, as 50586632055184 + 51424589156836 = 7112428^2 + 7171094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102011221212020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011221212023) 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, 170528705 + ... + 171125864.

It is an arithmetic number, because the mean of its divisors is an integer number (8926579777675).

Almost surely, 2^{102011221212020} is an apocalyptic number.

102011221212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102011221212020 is an abundant number, since it is smaller than the sum of its proper divisors (112226693452180).

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

102011221212020 is a wasteful number, since it uses less digits than its factorization.

102011221212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341669507 (or 341669505 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102011221212020 its reverse (20212122110201), we get a palindrome (122223343322221).

The spelling of 102011221212020 in words is "one hundred two trillion, eleven billion, two hundred twenty-one million, two hundred twelve thousand, twenty".