20212211312121 has 16 divisors (see below), whose sum is σ = 27265221086400. Its totient is φ = 13317146777088.

The previous prime is 20212211312107. The next prime is 20212211312129. The reversal of 20212211312121 is 12121311221202.

It is not a de Polignac number, because 20212211312121 - 2²³ = 20212202923513 is a prime.

It is a super-2 number, since 2×20212211312121² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20212211312129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17210131 + ... + 18347016.

It is an arithmetic number, because the mean of its divisors is an integer number (1704076317900).

Almost surely, 2^{20212211312121} is an apocalyptic number.

It is an amenable number.

20212211312121 is a deficient number, since it is larger than the sum of its proper divisors (7053009774279).

20212211312121 is a wasteful number, since it uses less digits than its factorization.

20212211312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35559368.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 20212211312121 its reverse (12121311221202), we get a palindrome (32333522533323).

The spelling of 20212211312121 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, three hundred twelve thousand, one hundred twenty-one".