1201021201005 has 16 divisors (see below), whose sum is σ = 1935458629440. Its totient is φ = 635936404608.

The previous prime is 1201021200991. The next prime is 1201021201063. The reversal of 1201021201005 is 5001021201021.

It is not a de Polignac number, because 1201021201005 - 2⁶ = 1201021200941 is a prime.

It is a super-2 number, since 2×1201021201005² (a number of 25 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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288012592 + ... + 288016761.

It is an arithmetic number, because the mean of its divisors is an integer number (120966164340).

Almost surely, 2^{1201021201005} is an apocalyptic number.

1201021201005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201021201005 is a deficient number, since it is larger than the sum of its proper divisors (734437428435).

1201021201005 is a wasteful number, since it uses less digits than its factorization.

1201021201005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576029500.

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

Adding to 1201021201005 its reverse (5001021201021), we get a palindrome (6202042402026).

The spelling of 1201021201005 in words is "one trillion, two hundred one billion, twenty-one million, two hundred one thousand, five".