3612121345 has 16 divisors (see below), whose sum is σ = 5016476160. Its totient is φ = 2445528384.

The previous prime is 3612121321. The next prime is 3612121399. The reversal of 3612121345 is 5431212163.

It is a cyclic number.

It is not a de Polignac number, because 3612121345 - 2¹¹ = 3612119297 is a prime.

It is a super-2 number, since 2×3612121345² = 26094841222009218050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650422 + ... + 655951.

It is an arithmetic number, because the mean of its divisors is an integer number (313529760).

Almost surely, 2^3612121345 is an apocalyptic number.

3612121345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3612121345 is a deficient number, since it is larger than the sum of its proper divisors (1404354815).

3612121345 is a wasteful number, since it uses less digits than its factorization.

3612121345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306464.

The product of its digits is 4320, while the sum is 28.

The square root of 3612121345 is about 60100.9263239761. The cubic root of 3612121345 is about 1534.3370676243.

The spelling of 3612121345 in words is "three billion, six hundred twelve million, one hundred twenty-one thousand, three hundred forty-five".