1211020222021 has 8 divisors (see below), whose sum is σ = 1228161093120. Its totient is φ = 1193924638608.

The previous prime is 1211020222019. The next prime is 1211020222031. The reversal of 1211020222021 is 1202220201121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211020222021 - 2¹ = 1211020222019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211020221986 and 1211020222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211020222031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11268061 + ... + 11375026.

It is an arithmetic number, because the mean of its divisors is an integer number (153520136640).

Almost surely, 2^{1211020222021} is an apocalyptic number.

It is an amenable number.

1211020222021 is a deficient number, since it is larger than the sum of its proper divisors (17140871099).

1211020222021 is an equidigital number, since it uses as much as digits as its factorization.

1211020222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22643843.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211020222021 its reverse (1202220201121), we get a palindrome (2413240423142).

The spelling of 1211020222021 in words is "one trillion, two hundred eleven billion, twenty million, two hundred twenty-two thousand, twenty-one".