20212121013 has 8 divisors (see below), whose sum is σ = 30799422528. Its totient is φ = 11549783424.

The previous prime is 20212121009. The next prime is 20212121021. The reversal of 20212121013 is 31012121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20212121013 - 2² = 20212121009 is a prime.

It is a super-2 number, since 2×20212121013² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20212120983 and 20212121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212121023) 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, 481240956 + ... + 481240997.

It is an arithmetic number, because the mean of its divisors is an integer number (3849927816).

Almost surely, 2^20212121013 is an apocalyptic number.

It is an amenable number.

20212121013 is a deficient number, since it is larger than the sum of its proper divisors (10587301515).

20212121013 is an equidigital number, since it uses as much as digits as its factorization.

20212121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962481963.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20212121013 its reverse (31012121202), we get a palindrome (51224242215).

The spelling of 20212121013 in words is "twenty billion, two hundred twelve million, one hundred twenty-one thousand, thirteen".