1101111210021 has 16 divisors (see below), whose sum is σ = 1507981758848. Its totient is φ = 714161448000.

The previous prime is 1101111210019. The next prime is 1101111210037. The reversal of 1101111210021 is 1200121111011.

It is not a de Polignac number, because 1101111210021 - 2¹ = 1101111210019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101111209979 and 1101111210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111210061) 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, 598056 + ... + 1599966.

It is an arithmetic number, because the mean of its divisors is an integer number (94248859928).

Almost surely, 2^{1101111210021} is an apocalyptic number.

It is an amenable number.

1101111210021 is a deficient number, since it is larger than the sum of its proper divisors (406870548827).

1101111210021 is a wasteful number, since it uses less digits than its factorization.

1101111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011852.

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

Adding to 1101111210021 its reverse (1200121111011), we get a palindrome (2301232321032).

The spelling of 1101111210021 in words is "one trillion, one hundred one billion, one hundred eleven million, two hundred ten thousand, twenty-one".