2121221010012 has 48 divisors (see below), whose sum is σ = 5331245885952. Its totient is φ = 652561156800.

The previous prime is 2121221009987. The next prime is 2121221010017. The reversal of 2121221010012 is 2100101221212.

It is a junction number, because it is equal to n+sod(n) for n = 2121221009973 and 2121221010000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121221010017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435808 + ... + 2105319.

It is an arithmetic number, because the mean of its divisors is an integer number (111067622624).

Almost surely, 2^{2121221010012} is an apocalyptic number.

It is an amenable number.

2121221010012 is an abundant number, since it is smaller than the sum of its proper divisors (3210024875940).

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

2121221010012 is a wasteful number, since it uses less digits than its factorization.

2121221010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546498 (or 2546496 counting only the distinct ones).

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

Adding to 2121221010012 its reverse (2100101221212), we get a palindrome (4221322231224).

The spelling of 2121221010012 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, ten thousand, twelve".