31023020101 has 2 divisors, whose sum is σ = 31023020102. Its totient is φ = 31023020100.

The previous prime is 31023020071. The next prime is 31023020137. The reversal of 31023020101 is 10102032013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29506307076 + 1516713025 = 171774^2 + 38945^2 .

It is an emirp because it is prime and its reverse (10102032013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31023020101 - 2¹³ = 31023011909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31023020801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15511510050 + 15511510051.

It is an arithmetic number, because the mean of its divisors is an integer number (15511510051).

Almost surely, 2^31023020101 is an apocalyptic number.

It is an amenable number.

31023020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31023020101 is an equidigital number, since it uses as much as digits as its factorization.

31023020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31023020101 its reverse (10102032013), we get a palindrome (41125052114).

It can be divided in two parts, 3102 and 3020101, that added together give a palindrome (3023203).

The spelling of 31023020101 in words is "thirty-one billion, twenty-three million, twenty thousand, one hundred one".