1221360501634 has 32 divisors (see below), whose sum is σ = 2277144366336. Its totient is φ = 478391659200.

The previous prime is 1221360501617. The next prime is 1221360501637. The reversal of 1221360501634 is 4361050631221.

It is a super-2 number, since 2×1221360501634² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221360501634.

It is not an unprimeable number, because it can be changed into a prime (1221360501637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33203262 + ... + 33240025.

It is an arithmetic number, because the mean of its divisors is an integer number (71160761448).

Almost surely, 2^{1221360501634} is an apocalyptic number.

1221360501634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221360501634 is a deficient number, since it is larger than the sum of its proper divisors (1055783864702).

1221360501634 is a wasteful number, since it uses less digits than its factorization.

1221360501634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66443410.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 1221360501634 in words is "one trillion, two hundred twenty-one billion, three hundred sixty million, five hundred one thousand, six hundred thirty-four".