1122212120021 has 4 divisors (see below), whose sum is σ = 1122214882572. Its totient is φ = 1122209357472.

The previous prime is 1122212119979. The next prime is 1122212120041. The reversal of 1122212120021 is 1200212122211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 230347203025 + 891864916996 = 479945^2 + 944386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122212120021 - 2²² = 1122207925717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122212120041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638966 + ... + 1628711.

It is an arithmetic number, because the mean of its divisors is an integer number (280553720643).

Almost surely, 2^{1122212120021} is an apocalyptic number.

It is an amenable number.

1122212120021 is a deficient number, since it is larger than the sum of its proper divisors (2762551).

1122212120021 is an equidigital number, since it uses as much as digits as its factorization.

1122212120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762550.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1122212120021 its reverse (1200212122211), we get a palindrome (2322424242232).

The spelling of 1122212120021 in words is "one trillion, one hundred twenty-two billion, two hundred twelve million, one hundred twenty thousand, twenty-one".