20212323122121 has 16 divisors (see below), whose sum is σ = 29092089848640. Its totient is φ = 12408666874560.

The previous prime is 20212323122059. The next prime is 20212323122153. The reversal of 20212323122121 is 12122132321202.

It is not a de Polignac number, because 20212323122121 - 2¹⁸ = 20212322859977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212323122091 and 20212323122100.

It is not an unprimeable number, because it can be changed into a prime (20212323022121) 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, 618437950 + ... + 618470631.

It is an arithmetic number, because the mean of its divisors is an integer number (1818255615540).

Almost surely, 2^{20212323122121} is an apocalyptic number.

It is an amenable number.

20212323122121 is a deficient number, since it is larger than the sum of its proper divisors (8879766726519).

20212323122121 is a wasteful number, since it uses less digits than its factorization.

20212323122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236909016.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20212323122121 its reverse (12122132321202), we get a palindrome (32334455443323).

The spelling of 20212323122121 in words is "twenty trillion, two hundred twelve billion, three hundred twenty-three million, one hundred twenty-two thousand, one hundred twenty-one".