1221275307292 has 24 divisors (see below), whose sum is σ = 2239726428576. Its totient is φ = 581581363968.

The previous prime is 1221275307283. The next prime is 1221275307293. The reversal of 1221275307292 is 2927035721221.

It is a super-3 number, since 3×1221275307292³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221275307293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28465113 + ... + 28507984.

It is an arithmetic number, because the mean of its divisors is an integer number (93321934524).

Almost surely, 2^{1221275307292} is an apocalyptic number.

It is an amenable number.

1221275307292 is a deficient number, since it is larger than the sum of its proper divisors (1018451121284).

1221275307292 is a wasteful number, since it uses less digits than its factorization.

1221275307292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56973357 (or 56973355 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 1221275307292 in words is "one trillion, two hundred twenty-one billion, two hundred seventy-five million, three hundred seven thousand, two hundred ninety-two".