1211121120010 has 32 divisors (see below), whose sum is σ = 2188846737792. Its totient is φ = 482487420480.

The previous prime is 1211121119983. The next prime is 1211121120029. The reversal of 1211121120010 is 100211211121.

It is a happy number.

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, 11020252 + ... + 11129608.

It is an arithmetic number, because the mean of its divisors is an integer number (68401460556).

Almost surely, 2^{1211121120010} is an apocalyptic number.

1211121120010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211121120010 is a deficient number, since it is larger than the sum of its proper divisors (977725617782).

1211121120010 is a wasteful number, since it uses less digits than its factorization.

1211121120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113838.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211121120010 its reverse (100211211121), we get a palindrome (1311332331131).

The spelling of 1211121120010 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, ten".