1013121010 has 64 divisors (see below), whose sum is σ = 2046207744. Its totient is φ = 358041600.

The previous prime is 1013120993. The next prime is 1013121017. The reversal of 1013121010 is 101213101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1013121017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569242 + ... + 571018.

It is an arithmetic number, because the mean of its divisors is an integer number (31971996).

Almost surely, 2^1013121010 is an apocalyptic number.

1013121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1013121010 is an abundant number, since it is smaller than the sum of its proper divisors (1033086734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1013121010 is a wasteful number, since it uses less digits than its factorization.

1013121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1013121010 is about 31829.5618882824. The cubic root of 1013121010 is about 1004.3546792424.

Adding to 1013121010 its reverse (101213101), we get a palindrome (1114334111).

The spelling of 1013121010 in words is "one billion, thirteen million, one hundred twenty-one thousand, ten".