1210221021200 has 60 divisors (see below), whose sum is σ = 2908307377620. Its totient is φ = 483963310080.

The previous prime is 1210221021193. The next prime is 1210221021221. The reversal of 1210221021200 is 21201220121.

It can be written as a sum of positive squares in 6 ways, for example, as 147185787904 + 1063035233296 = 383648^2 + 1031036^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1166612 + ... + 1944588.

It is an arithmetic number, because the mean of its divisors is an integer number (48471789627).

Almost surely, 2^{1210221021200} is an apocalyptic number.

1210221021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210221021200 is an abundant number, since it is smaller than the sum of its proper divisors (1698086356420).

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

1210221021200 is a wasteful number, since it uses less digits than its factorization.

1210221021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781884 (or 781873 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1210221021200 its reverse (21201220121), we get a palindrome (1231422241321).

The spelling of 1210221021200 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, twenty-one thousand, two hundred".