1211120021210 has 64 divisors (see below), whose sum is σ = 2397916224000. Its totient is φ = 436765286400.

The previous prime is 1211120021201. The next prime is 1211120021219. The reversal of 1211120021210 is 121200211121.

It is an interprime number because it is at equal distance from previous prime (1211120021201) and next prime (1211120021219).

It is not an unprimeable number, because it can be changed into a prime (1211120021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10448351 + ... + 10563629.

It is an arithmetic number, because the mean of its divisors is an integer number (37467441000).

Almost surely, 2^{1211120021210} is an apocalyptic number.

1211120021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211120021210 is a deficient number, since it is larger than the sum of its proper divisors (1186796202790).

1211120021210 is a wasteful number, since it uses less digits than its factorization.

1211120021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116087.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211120021210 its reverse (121200211121), we get a palindrome (1332320232331).

The spelling of 1211120021210 in words is "one trillion, two hundred eleven billion, one hundred twenty million, twenty-one thousand, two hundred ten".