2221211220312 has 32 divisors (see below), whose sum is σ = 6346317772800. Its totient is φ = 634631777184.

The previous prime is 2221211220253. The next prime is 2221211220329. The reversal of 2221211220312 is 2130221121222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6610747512 + ... + 6610747847.

It is an arithmetic number, because the mean of its divisors is an integer number (198322430400).

Almost surely, 2^{2221211220312} is an apocalyptic number.

It is an amenable number.

2221211220312 is an abundant number, since it is smaller than the sum of its proper divisors (4125106552488).

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

2221211220312 is a wasteful number, since it uses less digits than its factorization.

2221211220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13221495375 (or 13221495371 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2221211220312 its reverse (2130221121222), we get a palindrome (4351432341534).

The spelling of 2221211220312 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, three hundred twelve".