1122000020021 has 16 divisors (see below), whose sum is σ = 1149384115200. Its totient is φ = 1094998963968.

The previous prime is 1122000019999. The next prime is 1122000020033. The reversal of 1122000020021 is 1200200002211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1122000020021 - 2⁶ = 1122000019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122000019984 and 1122000020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122000020221) 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, 3104975 + ... + 3447443.

It is an arithmetic number, because the mean of its divisors is an integer number (71836507200).

Almost surely, 2^{1122000020021} is an apocalyptic number.

It is an amenable number.

1122000020021 is a deficient number, since it is larger than the sum of its proper divisors (27384095179).

1122000020021 is a wasteful number, since it uses less digits than its factorization.

1122000020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343028.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1122000020021 its reverse (1200200002211), we get a palindrome (2322200022232).

The spelling of 1122000020021 in words is "one trillion, one hundred twenty-two billion, twenty thousand, twenty-one".