2121203213030 has 128 divisors (see below), whose sum is σ = 4675817664000. Its totient is φ = 682814638080.

The previous prime is 2121203212993. The next prime is 2121203213033. The reversal of 2121203213030 is 303123021212.

It is a junction number, because it is equal to n+sod(n) for n = 2121203212993 and 2121203213011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121203213033) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4723916 + ... + 5153424.

It is an arithmetic number, because the mean of its divisors is an integer number (36529825500).

Almost surely, 2^{2121203213030} is an apocalyptic number.

2121203213030 is an abundant number, since it is smaller than the sum of its proper divisors (2554614450970).

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

2121203213030 is a wasteful number, since it uses less digits than its factorization.

2121203213030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429702.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2121203213030 its reverse (303123021212), we get a palindrome (2424326234242).

The spelling of 2121203213030 in words is "two trillion, one hundred twenty-one billion, two hundred three million, two hundred thirteen thousand, thirty".