1311020102 has 64 divisors (see below), whose sum is σ = 2479334400. Its totient is φ = 506943360.

The previous prime is 1311020099. The next prime is 1311020147. The reversal of 1311020102 is 2010201131.

It is a super-3 number, since 3×1311020102³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2575424 + ... + 2575932.

It is an arithmetic number, because the mean of its divisors is an integer number (38739600).

Almost surely, 2^1311020102 is an apocalyptic number.

1311020102 is a deficient number, since it is larger than the sum of its proper divisors (1168314298).

1311020102 is a wasteful number, since it uses less digits than its factorization.

1311020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1311020102 is about 36208.0115720264. The cubic root of 1311020102 is about 1094.4681228070.

Adding to 1311020102 its reverse (2010201131), we get a palindrome (3321221233).

The spelling of 1311020102 in words is "one billion, three hundred eleven million, twenty thousand, one hundred two".