1211122101010 has 32 divisors (see below), whose sum is σ = 2309152095360. Its totient is φ = 455774890752.

The previous prime is 1211122100989. The next prime is 1211122101017. The reversal of 1211122101010 is 101012211121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1211122101017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942774 + ... + 1819633.

It is an arithmetic number, because the mean of its divisors is an integer number (72161002980).

Almost surely, 2^{1211122101010} is an apocalyptic number.

1211122101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211122101010 is a deficient number, since it is larger than the sum of its proper divisors (1098029994350).

1211122101010 is a wasteful number, since it uses less digits than its factorization.

1211122101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765010.

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

Adding to 1211122101010 its reverse (101012211121), we get a palindrome (1312134312131).

The spelling of 1211122101010 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred one thousand, ten".