2021212113312 has 192 divisors, whose sum is σ = 6268581494784. Its totient is φ = 558026219520.

The previous prime is 2021212113229. The next prime is 2021212113313. The reversal of 2021212113312 is 2133112121202.

It is a super-2 number, since 2×2021212113312² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2021212113313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13947853 + ... + 14092019.

It is an arithmetic number, because the mean of its divisors is an integer number (32648861952).

Almost surely, 2^{2021212113312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021212113312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3134290747392).

2021212113312 is an abundant number, since it is smaller than the sum of its proper divisors (4247369381472).

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

2021212113312 is a wasteful number, since it uses less digits than its factorization.

2021212113312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144891 (or 144883 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2021212113312 its reverse (2133112121202), we get a palindrome (4154324234514).

The spelling of 2021212113312 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred thirteen thousand, three hundred twelve".