1210021001200 has 60 divisors (see below), whose sum is σ = 3171355053768. Its totient is φ = 440007635200.

The previous prime is 1210021001183. The next prime is 1210021001239. The reversal of 1210021001200 is 21001200121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 137497987 + ... + 137506786.

Almost surely, 2^{1210021001200} is an apocalyptic number.

1210021001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210021001200 is an abundant number, since it is smaller than the sum of its proper divisors (1961334052568).

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

1210021001200 is a wasteful number, since it uses less digits than its factorization.

1210021001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275004802 (or 275004791 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1210021001200 its reverse (21001200121), we get a palindrome (1231022201321).

The spelling of 1210021001200 in words is "one trillion, two hundred ten billion, twenty-one million, one thousand, two hundred".