1210200021320 has 32 divisors (see below), whose sum is σ = 2723024659320. Its totient is φ = 484066744320.

The previous prime is 1210200021319. The next prime is 1210200021341. The reversal of 1210200021320 is 231200020121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1186395851524 + 23804169796 = 1089218^2 + 154286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1210200021295 and 1210200021304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135064 + ... + 1925816.

Almost surely, 2^{1210200021320} is an apocalyptic number.

1210200021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210200021320 is an abundant number, since it is smaller than the sum of its proper divisors (1512824638000).

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

1210200021320 is a wasteful number, since it uses less digits than its factorization.

1210200021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829025 (or 829021 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1210200021320 its reverse (231200020121), we get a palindrome (1441400041441).

The spelling of 1210200021320 in words is "one trillion, two hundred ten billion, two hundred million, twenty-one thousand, three hundred twenty".