1011211120100 has 72 divisors (see below), whose sum is σ = 2310063084000. Its totient is φ = 383155315200.

The previous prime is 1011211120061. The next prime is 1011211120109. The reversal of 1011211120100 is 10211121101.

It is not an unprimeable number, because it can be changed into a prime (1011211120109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22871015 + ... + 22915185.

It is an arithmetic number, because the mean of its divisors is an integer number (32084209500).

Almost surely, 2^{1011211120100} is an apocalyptic number.

1011211120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011211120100 is an abundant number, since it is smaller than the sum of its proper divisors (1298851963900).

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

1011211120100 is a wasteful number, since it uses less digits than its factorization.

1011211120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56253 (or 56246 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1011211120100 its reverse (10211121101), we get a palindrome (1021422241201).

It can be divided in two parts, 1011211 and 120100, that added together give a palindrome (1131311).

The spelling of 1011211120100 in words is "one trillion, eleven billion, two hundred eleven million, one hundred twenty thousand, one hundred".