1221010411312 has 40 divisors (see below), whose sum is σ = 2375485615440. Its totient is φ = 607982592000.

The previous prime is 1221010411279. The next prime is 1221010411343. The reversal of 1221010411312 is 2131140101221.

It is a super-2 number, since 2×1221010411312² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221010411312.

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, 33045264 + ... + 33082192.

It is an arithmetic number, because the mean of its divisors is an integer number (59387140386).

Almost surely, 2^{1221010411312} is an apocalyptic number.

It is an amenable number.

1221010411312 is a deficient number, since it is larger than the sum of its proper divisors (1154475204128).

1221010411312 is a wasteful number, since it uses less digits than its factorization.

1221010411312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45421 (or 45415 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1221010411312 its reverse (2131140101221), we get a palindrome (3352150512533).

The spelling of 1221010411312 in words is "one trillion, two hundred twenty-one billion, ten million, four hundred eleven thousand, three hundred twelve".