20212121010012 has 12 divisors (see below), whose sum is σ = 47161615690056. Its totient is φ = 6737373670000.

The previous prime is 20212121009963. The next prime is 20212121010041. The reversal of 20212121010012 is 21001012121202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20212121010012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20212121009973 and 20212121010000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842171708739 + ... + 842171708762.

It is an arithmetic number, because the mean of its divisors is an integer number (3930134640838).

Almost surely, 2^{20212121010012} is an apocalyptic number.

It is an amenable number.

20212121010012 is an abundant number, since it is smaller than the sum of its proper divisors (26949494680044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20212121010012 is a wasteful number, since it uses less digits than its factorization.

20212121010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684343417508 (or 1684343417506 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20212121010012 its reverse (21001012121202), we get a palindrome (41213133131214).

The spelling of 20212121010012 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, ten thousand, twelve".