1212620513 has 16 divisors (see below), whose sum is σ = 1366364160. Its totient is φ = 1067778624.

The previous prime is 1212620503. The next prime is 1212620543. The reversal of 1212620513 is 3150262121.

It is a cyclic number.

It is not a de Polignac number, because 1212620513 - 2¹² = 1212616417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212620503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109223 + ... + 119811.

It is an arithmetic number, because the mean of its divisors is an integer number (85397760).

Almost surely, 2^1212620513 is an apocalyptic number.

1212620513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212620513 is a deficient number, since it is larger than the sum of its proper divisors (153743647).

1212620513 is a wasteful number, since it uses less digits than its factorization.

1212620513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1212620513 is about 34822.7011157951. The cubic root of 1212620513 is about 1066.3709450511.

Adding to 1212620513 its reverse (3150262121), we get a palindrome (4362882634).

The spelling of 1212620513 in words is "one billion, two hundred twelve million, six hundred twenty thousand, five hundred thirteen".