200121112021031 has 2 divisors, whose sum is σ = 200121112021032. Its totient is φ = 200121112021030.

The previous prime is 200121112020913. The next prime is 200121112021121. The reversal of 200121112021031 is 130120211121002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121112021031 is a prime.

It is a super-2 number, since 2×200121112021031² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200121112021231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060556010515 + 100060556010516.

It is an arithmetic number, because the mean of its divisors is an integer number (100060556010516).

Almost surely, 2^{200121112021031} is an apocalyptic number.

200121112021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121112021031 is an equidigital number, since it uses as much as digits as its factorization.

200121112021031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 200121112021031 its reverse (130120211121002), we get a palindrome (330241323142033).

The spelling of 200121112021031 in words is "two hundred trillion, one hundred twenty-one billion, one hundred twelve million, twenty-one thousand, thirty-one".