1331020101 has 8 divisors (see below), whose sum is σ = 1774863424. Its totient is φ = 887261760.

The previous prime is 1331020099. The next prime is 1331020109. The reversal of 1331020101 is 1010201331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1331020101 - 2¹ = 1331020099 is a prime.

It is a super-2 number, since 2×1331020101² = 3543229018532100402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331020109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43440 + ... + 67446.

It is an arithmetic number, because the mean of its divisors is an integer number (221857928).

Almost surely, 2^1331020101 is an apocalyptic number.

It is an amenable number.

1331020101 is a deficient number, since it is larger than the sum of its proper divisors (443843323).

1331020101 is a wasteful number, since it uses less digits than its factorization.

1331020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42491.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1331020101 is about 36483.1481783028. The cubic root of 1331020101 is about 1100.0055374377.

Adding to 1331020101 its reverse (1010201331), we get a palindrome (2341221432).

It can be divided in two parts, 13310 and 20101, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 1331020101 in words is "one billion, three hundred thirty-one million, twenty thousand, one hundred one".