2100121221210 has 32 divisors (see below), whose sum is σ = 5163224859072. Its totient is φ = 546373000320.

The previous prime is 2100121221197. The next prime is 2100121221217. The reversal of 2100121221210 is 121221210012.

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 2100121221210.

It is not an unprimeable number, because it can be changed into a prime (2100121221217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853706584 + ... + 853709043.

It is an arithmetic number, because the mean of its divisors is an integer number (161350776846).

Almost surely, 2^{2100121221210} is an apocalyptic number.

2100121221210 is an abundant number, since it is smaller than the sum of its proper divisors (3063103637862).

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

2100121221210 is a wasteful number, since it uses less digits than its factorization.

2100121221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707415678.

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

Adding to 2100121221210 its reverse (121221210012), we get a palindrome (2221342431222).

The spelling of 2100121221210 in words is "two trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".