2121222011012 has 24 divisors (see below), whose sum is σ = 3999328288536. Its totient is φ = 978623751168.

The previous prime is 2121222011009. The next prime is 2121222011021. The reversal of 2121222011012 is 2101102221212.

It can be written as a sum of positive squares in 4 ways, for example, as 1123332895876 + 997889115136 = 1059874^2 + 998944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8242733 + ... + 8496180.

It is an arithmetic number, because the mean of its divisors is an integer number (166638678689).

Almost surely, 2^{2121222011012} is an apocalyptic number.

It is an amenable number.

2121222011012 is a deficient number, since it is larger than the sum of its proper divisors (1878106277524).

2121222011012 is a wasteful number, since it uses less digits than its factorization.

2121222011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16741367 (or 16741365 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121222011012 its reverse (2101102221212), we get a palindrome (4222324232224).

The spelling of 2121222011012 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, twelve".