1100021121212 has 24 divisors (see below), whose sum is σ = 2073345360576. Its totient is φ = 507646064448.

The previous prime is 1100021121211. The next prime is 1100021121239. The reversal of 1100021121212 is 2121211200011.

It is a super-2 number, since 2×1100021121212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100021121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688583 + ... + 1635294.

It is an arithmetic number, because the mean of its divisors is an integer number (86389390024).

Almost surely, 2^{1100021121212} is an apocalyptic number.

It is an amenable number.

1100021121212 is a deficient number, since it is larger than the sum of its proper divisors (973324239364).

1100021121212 is a wasteful number, since it uses less digits than its factorization.

1100021121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332997 (or 2332995 counting only the distinct ones).

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

Adding to 1100021121212 its reverse (2121211200011), we get a palindrome (3221232321223).

The spelling of 1100021121212 in words is "one trillion, one hundred billion, twenty-one million, one hundred twenty-one thousand, two hundred twelve".