2021121102210 has 64 divisors (see below), whose sum is σ = 5722473775104. Its totient is φ = 447068260800.

The previous prime is 2021121102181. The next prime is 2021121102211. The reversal of 2021121102210 is 122011211202.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021121102210.

It is not an unprimeable number, because it can be changed into a prime (2021121102211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155225526 + ... + 155238545.

It is an arithmetic number, because the mean of its divisors is an integer number (89413652736).

Almost surely, 2^{2021121102210} is an apocalyptic number.

2021121102210 is an abundant number, since it is smaller than the sum of its proper divisors (3701352672894).

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

2021121102210 is a wasteful number, since it uses less digits than its factorization.

2021121102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310464119.

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

Adding to 2021121102210 its reverse (122011211202), we get a palindrome (2143132313412).

The spelling of 2021121102210 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred two thousand, two hundred ten".