1201021023031 has 4 divisors (see below), whose sum is σ = 1203241025464. Its totient is φ = 1198801020600.

The previous prime is 1201021023017. The next prime is 1201021023043. The reversal of 1201021023031 is 1303201201021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201021023031 is a prime.

It is a super-2 number, since 2×1201021023031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201021022996 and 1201021023014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021023001) 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, 1110000405 + ... + 1110001486.

It is an arithmetic number, because the mean of its divisors is an integer number (300810256366).

Almost surely, 2^{1201021023031} is an apocalyptic number.

1201021023031 is a deficient number, since it is larger than the sum of its proper divisors (2220002433).

1201021023031 is an equidigital number, since it uses as much as digits as its factorization.

1201021023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220002432.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1201021023031 its reverse (1303201201021), we get a palindrome (2504222224052).

The spelling of 1201021023031 in words is "one trillion, two hundred one billion, twenty-one million, twenty-three thousand, thirty-one".