121201201005 has 16 divisors (see below), whose sum is σ = 202353310080. Its totient is φ = 61830177728.

The previous prime is 121201200947. The next prime is 121201201007. The reversal of 121201201005 is 500102102121.

It is a cyclic number.

It is not a de Polignac number, because 121201201005 - 2⁶ = 121201200941 is a prime.

It is a super-2 number, since 2×121201201005² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201201007) 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, 175653570 + ... + 175654259.

It is an arithmetic number, because the mean of its divisors is an integer number (12647081880).

Almost surely, 2^121201201005 is an apocalyptic number.

121201201005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121201201005 is a deficient number, since it is larger than the sum of its proper divisors (81152109075).

121201201005 is a wasteful number, since it uses less digits than its factorization.

121201201005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351307860.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 121201201005 its reverse (500102102121), we get a palindrome (621303303126).

The spelling of 121201201005 in words is "one hundred twenty-one billion, two hundred one million, two hundred one thousand, five".