1200121302131 has 4 divisors (see below), whose sum is σ = 1200312929232. Its totient is φ = 1199929675032.

The previous prime is 1200121302091. The next prime is 1200121302137. The reversal of 1200121302131 is 1312031210021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200121302131 - 2¹⁸ = 1200121039987 is a prime.

It is a super-2 number, since 2×1200121302131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200121302137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95804156 + ... + 95816681.

It is an arithmetic number, because the mean of its divisors is an integer number (300078232308).

Almost surely, 2^{1200121302131} is an apocalyptic number.

1200121302131 is a deficient number, since it is larger than the sum of its proper divisors (191627101).

1200121302131 is an equidigital number, since it uses as much as digits as its factorization.

1200121302131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191627100.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1200121302131 its reverse (1312031210021), we get a palindrome (2512152512152).

The spelling of 1200121302131 in words is "one trillion, two hundred billion, one hundred twenty-one million, three hundred two thousand, one hundred thirty-one".