1213220295 has 32 divisors (see below), whose sum is σ = 2464957440. Its totient is φ = 554614560.

The previous prime is 1213220273. The next prime is 1213220303. The reversal of 1213220295 is 5920223121.

It is a happy number.

It is not a de Polignac number, because 1213220295 - 2⁸ = 1213220039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640971 + ... + 642860.

It is an arithmetic number, because the mean of its divisors is an integer number (77029920).

Almost surely, 2^1213220295 is an apocalyptic number.

1213220295 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213220295 is an abundant number, since it is smaller than the sum of its proper divisors (1251737145).

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

1213220295 is a wasteful number, since it uses less digits than its factorization.

1213220295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283852 (or 1283846 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1213220295 is about 34831.3119907936. The cubic root of 1213220295 is about 1066.5467309269.

The spelling of 1213220295 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, two hundred ninety-five".