20122111212021 has 32 divisors (see below), whose sum is σ = 36689889393920. Its totient is φ = 10613860857792.

The previous prime is 20122111212011. The next prime is 20122111212023. The reversal of 20122111212021 is 12021211122102.

20122111212021 is a `hidden beast` number, since 201 + 221 + 11 + 212 + 0 + 21 = 666.

It is not a de Polignac number, because 20122111212021 - 2¹¹ = 20122111209973 is a prime.

It is a super-2 number, since 2×20122111212021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20122111211985 and 20122111212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122111212023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4094851270 + ... + 4094856183.

It is an arithmetic number, because the mean of its divisors is an integer number (1146559043560).

Almost surely, 2^{20122111212021} is an apocalyptic number.

20122111212021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20122111212021 is a deficient number, since it is larger than the sum of its proper divisors (16567778181899).

20122111212021 is a wasteful number, since it uses less digits than its factorization.

20122111212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189707482 (or 8189707476 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20122111212021 its reverse (12021211122102), we get a palindrome (32143322334123).

The spelling of 20122111212021 in words is "twenty trillion, one hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, twenty-one".