1211000210120 has 64 divisors (see below), whose sum is σ = 2734487262000. Its totient is φ = 482671602688.

The previous prime is 1211000210107. The next prime is 1211000210159. The reversal of 1211000210120 is 210120001121.

It can be written as a sum of positive squares in 8 ways, for example, as 343393656004 + 867606554116 = 585998^2 + 931454^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15723866 + ... + 15800694.

Almost surely, 2^{1211000210120} is an apocalyptic number.

1211000210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211000210120 is an abundant number, since it is smaller than the sum of its proper divisors (1523487051880).

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

1211000210120 is a wasteful number, since it uses less digits than its factorization.

1211000210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78242 (or 78238 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1211000210120 its reverse (210120001121), we get a palindrome (1421120211241).

The spelling of 1211000210120 in words is "one trillion, two hundred eleven billion, two hundred ten thousand, one hundred twenty".