2021021211210 has 16 divisors (see below), whose sum is σ = 4850450906976. Its totient is φ = 538938989648.

The previous prime is 2021021211179. The next prime is 2021021211217. The reversal of 2021021211210 is 121121201202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021021211210.

It is not an unprimeable number, because it can be changed into a prime (2021021211217) 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, 33683686824 + ... + 33683686883.

It is an arithmetic number, because the mean of its divisors is an integer number (303153181686).

Almost surely, 2^{2021021211210} is an apocalyptic number.

2021021211210 is an abundant number, since it is smaller than the sum of its proper divisors (2829429695766).

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

2021021211210 is a wasteful number, since it uses less digits than its factorization.

2021021211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67367373717.

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

Adding to 2021021211210 its reverse (121121201202), we get a palindrome (2142142412412).

The spelling of 2021021211210 in words is "two trillion, twenty-one billion, twenty-one million, two hundred eleven thousand, two hundred ten".