20022212121211 has 4 divisors (see below), whose sum is σ = 20024206971552. Its totient is φ = 20020217270872.

The previous prime is 20022212121209. The next prime is 20022212121269. The reversal of 20022212121211 is 11212121222002.

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

It is a cyclic number.

It is not a de Polignac number, because 20022212121211 - 2¹ = 20022212121209 is a prime.

It is a super-2 number, since 2×20022212121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022212121271) 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, 997410115 + ... + 997430188.

It is an arithmetic number, because the mean of its divisors is an integer number (5006051742888).

Almost surely, 2^{20022212121211} is an apocalyptic number.

20022212121211 is a deficient number, since it is larger than the sum of its proper divisors (1994850341).

20022212121211 is a wasteful number, since it uses less digits than its factorization.

20022212121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994850340.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20022212121211 its reverse (11212121222002), we get a palindrome (31234333343213).

The spelling of 20022212121211 in words is "twenty trillion, twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".