20022121211 has 4 divisors (see below), whose sum is σ = 20022466752. Its totient is φ = 20021775672.

The previous prime is 20022121199. The next prime is 20022121243. The reversal of 20022121211 is 11212122002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20022121211 is a prime.

It is a super-2 number, since 2×20022121211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022121271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62315 + ... + 209588.

It is an arithmetic number, because the mean of its divisors is an integer number (5005616688).

Almost surely, 2^20022121211 is an apocalyptic number.

20022121211 is a deficient number, since it is larger than the sum of its proper divisors (345541).

20022121211 is an equidigital number, since it uses as much as digits as its factorization.

20022121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345540.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20022121211 its reverse (11212122002), we get a palindrome (31234243213).

The spelling of 20022121211 in words is "twenty billion, twenty-two million, one hundred twenty-one thousand, two hundred eleven".