1121002102021 has 16 divisors (see below), whose sum is σ = 1195348886784. Its totient is φ = 1048909365504.

The previous prime is 1121002102007. The next prime is 1121002102037. The reversal of 1121002102021 is 1202012001211.

It is a cyclic number.

It is not a de Polignac number, because 1121002102021 - 2¹⁹ = 1121001577733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121002101992 and 1121002102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121002102621) 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, 953601 + ... + 1775206.

It is an arithmetic number, because the mean of its divisors is an integer number (74709305424).

Almost surely, 2^{1121002102021} is an apocalyptic number.

It is an amenable number.

1121002102021 is a deficient number, since it is larger than the sum of its proper divisors (74346784763).

1121002102021 is a wasteful number, since it uses less digits than its factorization.

1121002102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729220.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1121002102021 its reverse (1202012001211), we get a palindrome (2323014103232).

The spelling of 1121002102021 in words is "one trillion, one hundred twenty-one billion, two million, one hundred two thousand, twenty-one".