1011001021121 has 16 divisors (see below), whose sum is σ = 1309798896000. Its totient is φ = 757812215808.

The previous prime is 1011001021111. The next prime is 1011001021139. The reversal of 1011001021121 is 1211201001101.

1011001021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011001021121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011001021111) 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, 292364096 + ... + 292367553.

It is an arithmetic number, because the mean of its divisors is an integer number (81862431000).

Almost surely, 2^{1011001021121} is an apocalyptic number.

It is an amenable number.

1011001021121 is a deficient number, since it is larger than the sum of its proper divisors (298797874879).

1011001021121 is a wasteful number, since it uses less digits than its factorization.

1011001021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584731688.

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

Adding to 1011001021121 its reverse (1211201001101), we get a palindrome (2222202022222).

The spelling of 1011001021121 in words is "one trillion, eleven billion, one million, twenty-one thousand, one hundred twenty-one".