1211102111010 has 64 divisors (see below), whose sum is σ = 3202280521344. Its totient is φ = 290693568000.

The previous prime is 1211102110979. The next prime is 1211102111047. The reversal of 1211102111010 is 101112011121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18135019 + ... + 18201678.

It is an arithmetic number, because the mean of its divisors is an integer number (50035633146).

Almost surely, 2^{1211102111010} is an apocalyptic number.

1211102111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211102111010 is an abundant number, since it is smaller than the sum of its proper divisors (1991178410334).

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

1211102111010 is a wasteful number, since it uses less digits than its factorization.

1211102111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36336819.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1211102111010 its reverse (101112011121), we get a palindrome (1312214122131).

The spelling of 1211102111010 in words is "one trillion, two hundred eleven billion, one hundred two million, one hundred eleven thousand, ten".