1211200021210 has 8 divisors (see below), whose sum is σ = 2180160038196. Its totient is φ = 484480008480.

The previous prime is 1211200021193. The next prime is 1211200021223. The reversal of 1211200021210 is 121200021121.

It can be written as a sum of positive squares in 2 ways, for example, as 1201915349761 + 9284671449 = 1096319^2 + 96357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60560001051 + ... + 60560001070.

Almost surely, 2^{1211200021210} is an apocalyptic number.

1211200021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211200021210 is a deficient number, since it is larger than the sum of its proper divisors (968960016986).

1211200021210 is a wasteful number, since it uses less digits than its factorization.

1211200021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121120002128.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211200021210 its reverse (121200021121), we get a palindrome (1332400042331).

The spelling of 1211200021210 in words is "one trillion, two hundred eleven billion, two hundred million, twenty-one thousand, two hundred ten".