1100000012121 has 12 divisors (see below), whose sum is σ = 1590782706240. Its totient is φ = 732459279960.

The previous prime is 1100000012117. The next prime is 1100000012147. The reversal of 1100000012121 is 1212100000011.

It is a happy number.

It is not a de Polignac number, because 1100000012121 - 2² = 1100000012117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1100000012161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72830485 + ... + 72845586.

It is an arithmetic number, because the mean of its divisors is an integer number (132565225520).

Almost surely, 2^{1100000012121} is an apocalyptic number.

It is an amenable number.

1100000012121 is a deficient number, since it is larger than the sum of its proper divisors (490782694119).

1100000012121 is a wasteful number, since it uses less digits than its factorization.

1100000012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145676916 (or 145676913 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1100000012121 its reverse (1212100000011), we get a palindrome (2312100012132).

The spelling of 1100000012121 in words is "one trillion, one hundred billion, twelve thousand, one hundred twenty-one".