2221121211210 has 96 divisors (see below), whose sum is σ = 6300226977408. Its totient is φ = 538426316160.

The previous prime is 2221121211203. The next prime is 2221121211233. The reversal of 2221121211210 is 121121211222.

2221121211210 is a `hidden beast` number, since 2 + 221 + 1 + 21 + 211 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25075059 + ... + 25163481.

It is an arithmetic number, because the mean of its divisors is an integer number (65627364348).

Almost surely, 2^{2221121211210} is an apocalyptic number.

2221121211210 is an abundant number, since it is smaller than the sum of its proper divisors (4079105766198).

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

2221121211210 is a wasteful number, since it uses less digits than its factorization.

2221121211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113820 (or 113817 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2221121211210 its reverse (121121211222), we get a palindrome (2342242422432).

The spelling of 2221121211210 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred ten".