2121221001012 has 48 divisors (see below), whose sum is σ = 5164832020992. Its totient is φ = 676315617120.

The previous prime is 2121221000947. The next prime is 2121221001139. The reversal of 2121221001012 is 2101001221212.

It is a junction number, because it is equal to n+sod(n) for n = 2121221000982 and 2121221001000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19903587 + ... + 20009877.

It is an arithmetic number, because the mean of its divisors is an integer number (107600667104).

Almost surely, 2^{2121221001012} is an apocalyptic number.

It is an amenable number.

2121221001012 is an abundant number, since it is smaller than the sum of its proper divisors (3043611019980).

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

2121221001012 is a wasteful number, since it uses less digits than its factorization.

2121221001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178628 (or 178626 counting only the distinct ones).

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

Adding to 2121221001012 its reverse (2101001221212), we get a palindrome (4222222222224).

The spelling of 2121221001012 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, one thousand, twelve".