2121311001212 has 24 divisors (see below), whose sum is σ = 4006759302000. Its totient is φ = 976886055936.

The previous prime is 2121311001211. The next prime is 2121311001221. The reversal of 2121311001212 is 2121001131212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121311001211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45404762 + ... + 45451457.

It is an arithmetic number, because the mean of its divisors is an integer number (166948304250).

Almost surely, 2^{2121311001212} is an apocalyptic number.

It is an amenable number.

2121311001212 is a deficient number, since it is larger than the sum of its proper divisors (1885448300788).

2121311001212 is a wasteful number, since it uses less digits than its factorization.

2121311001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90856685 (or 90856683 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121311001212 its reverse (2121001131212), we get a palindrome (4242312132424).

The spelling of 2121311001212 in words is "two trillion, one hundred twenty-one billion, three hundred eleven million, one thousand, two hundred twelve".