2121001220212 has 36 divisors (see below), whose sum is σ = 4341874078080. Its totient is φ = 903922292784.

The previous prime is 2121001220209. The next prime is 2121001220243. The reversal of 2121001220212 is 2120221001212.

It is a happy number.

It is a super-2 number, since 2×2121001220212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30192388 + ... + 30262555.

It is an arithmetic number, because the mean of its divisors is an integer number (120607613280).

Almost surely, 2^{2121001220212} is an apocalyptic number.

It is an amenable number.

2121001220212 is an abundant number, since it is smaller than the sum of its proper divisors (2220872857868).

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

2121001220212 is a wasteful number, since it uses less digits than its factorization.

2121001220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60455140 (or 60455131 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121001220212 its reverse (2120221001212), we get a palindrome (4241222221424).

The spelling of 2121001220212 in words is "two trillion, one hundred twenty-one billion, one million, two hundred twenty thousand, two hundred twelve".