102021221201020 has 48 divisors (see below), whose sum is σ = 233893071459936. Its totient is φ = 37071367424000.

The previous prime is 102021221200949. The next prime is 102021221201023. The reversal of 102021221201020 is 20102122120201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102021221200985 and 102021221201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021221201023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170065321 + ... + 170664160.

It is an arithmetic number, because the mean of its divisors is an integer number (4872772322082).

Almost surely, 2^{102021221201020} is an apocalyptic number.

102021221201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021221201020 is an abundant number, since it is smaller than the sum of its proper divisors (131871850258916).

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

102021221201020 is a wasteful number, since it uses less digits than its factorization.

102021221201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340730862 (or 340730860 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102021221201020 its reverse (20102122120201), we get a palindrome (122123343321221).

The spelling of 102021221201020 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-one million, two hundred one thousand, twenty".