102302121220 has 48 divisors (see below), whose sum is σ = 231385594608. Its totient is φ = 37768942080.

The previous prime is 102302121209. The next prime is 102302121221. The reversal of 102302121220 is 22121203201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3955906816 + 98346214404 = 62896^2 + 313602^2 .

It is a super-2 number, since 2×102302121220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102302121194 and 102302121203.

It is not an unprimeable number, because it can be changed into a prime (102302121221) 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, 3374530 + ... + 3404710.

It is an arithmetic number, because the mean of its divisors is an integer number (4820533221).

Almost surely, 2^102302121220 is an apocalyptic number.

102302121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102302121220 is an abundant number, since it is smaller than the sum of its proper divisors (129083473388).

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

102302121220 is a wasteful number, since it uses less digits than its factorization.

102302121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43240 (or 43238 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 102302121220 its reverse (22121203201), we get a palindrome (124423324421).

The spelling of 102302121220 in words is "one hundred two billion, three hundred two million, one hundred twenty-one thousand, two hundred twenty".