1221117350260 has 12 divisors (see below), whose sum is σ = 2564346435588. Its totient is φ = 488446940096.

The previous prime is 1221117350251. The next prime is 1221117350267. The reversal of 1221117350260 is 620537111221.

It can be written as a sum of positive squares in 2 ways, for example, as 402204566416 + 818912783844 = 634196^2 + 904938^2 .

It is a super-2 number, since 2×1221117350260² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221117350267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30527933737 + ... + 30527933776.

It is an arithmetic number, because the mean of its divisors is an integer number (213695536299).

Almost surely, 2^{1221117350260} is an apocalyptic number.

1221117350260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221117350260 is an abundant number, since it is smaller than the sum of its proper divisors (1343229085328).

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

1221117350260 is a wasteful number, since it uses less digits than its factorization.

1221117350260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61055867522 (or 61055867520 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 1221117350260 in words is "one trillion, two hundred twenty-one billion, one hundred seventeen million, three hundred fifty thousand, two hundred sixty".