102021031 has 16 divisors (see below), whose sum is σ = 125595648. Its totient is φ = 80942400.

The previous prime is 102021001. The next prime is 102021037. The reversal of 102021031 is 130120201.

It is not a de Polignac number, because 102021031 - 2⁷ = 102020903 is a prime.

It is a super-2 number, since 2×102021031² = 20816581532605922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020999 and 102021017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5230 + ... + 15211.

It is an arithmetic number, because the mean of its divisors is an integer number (7849728).

Almost surely, 2^102021031 is an apocalyptic number.

102021031 is a deficient number, since it is larger than the sum of its proper divisors (23574617).

102021031 is a wasteful number, since it uses less digits than its factorization.

102021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20502.

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

The square root of 102021031 is about 10100.5460743467. The cubic root of 102021031 is about 467.2649829639.

Adding to 102021031 its reverse (130120201), we get a palindrome (232141232).

The spelling of 102021031 in words is "one hundred two million, twenty-one thousand, thirty-one".