2121222020012 has 6 divisors (see below), whose sum is σ = 3712138535028. Its totient is φ = 1060611010004.

The previous prime is 2121222019967. The next prime is 2121222020023. The reversal of 2121222020012 is 2100202221212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265152752498 + ... + 265152752505.

It is an arithmetic number, because the mean of its divisors is an integer number (618689755838).

Almost surely, 2^{2121222020012} is an apocalyptic number.

It is an amenable number.

2121222020012 is a deficient number, since it is larger than the sum of its proper divisors (1590916515016).

2121222020012 is a wasteful number, since it uses less digits than its factorization.

2121222020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530305505007 (or 530305505005 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2121222020012 its reverse (2100202221212), we get a palindrome (4221424241224).

The spelling of 2121222020012 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, twenty thousand, twelve".