10021200031 has 4 divisors (see below), whose sum is σ = 10022965992. Its totient is φ = 10019434072.

The previous prime is 10021199989. The next prime is 10021200037. The reversal of 10021200031 is 13000212001.

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 10021200031 - 2⁹ = 10021199519 is a prime.

It is a super-3 number, since 3×10021200031³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021199990 and 10021200017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021200037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874441 + ... + 885826.

It is an arithmetic number, because the mean of its divisors is an integer number (2505741498).

Almost surely, 2^10021200031 is an apocalyptic number.

10021200031 is a deficient number, since it is larger than the sum of its proper divisors (1765961).

10021200031 is an equidigital number, since it uses as much as digits as its factorization.

10021200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765960.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10021200031 its reverse (13000212001), we get a palindrome (23021412032).

The spelling of 10021200031 in words is "ten billion, twenty-one million, two hundred thousand, thirty-one".