20212220112121 has 8 divisors (see below), whose sum is σ = 20885714604288. Its totient is φ = 19540068582000.

The previous prime is 20212220112107. The next prime is 20212220112173. The reversal of 20212220112121 is 12121102221202.

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 20212220112121 - 2¹⁵ = 20212220079353 is a prime.

It is a super-2 number, since 2×20212220112121² (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 (20212220112521) 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, 335709910 + ... + 335770111.

It is an arithmetic number, because the mean of its divisors is an integer number (2610714325536).

Almost surely, 2^{20212220112121} is an apocalyptic number.

It is an amenable number.

20212220112121 is a deficient number, since it is larger than the sum of its proper divisors (673494492167).

20212220112121 is an equidigital number, since it uses as much as digits as its factorization.

20212220112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671481023.

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

Adding to 20212220112121 its reverse (12121102221202), we get a palindrome (32333322333323).

The spelling of 20212220112121 in words is "twenty trillion, two hundred twelve billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-one".