1012121110 has 64 divisors (see below), whose sum is σ = 2446101504. Its totient is φ = 291196800.

The previous prime is 1012121081. The next prime is 1012121113. The reversal of 1012121110 is 111212101.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40546 + ... + 60565.

It is an arithmetic number, because the mean of its divisors is an integer number (38220336).

Almost surely, 2^1012121110 is an apocalyptic number.

1012121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1012121110 is an abundant number, since it is smaller than the sum of its proper divisors (1433980394).

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

1012121110 is a wasteful number, since it uses less digits than its factorization.

1012121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101149.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1012121110 is about 31813.8509143423. The cubic root of 1012121110 is about 1004.0241544587.

Adding to 1012121110 its reverse (111212101), we get a palindrome (1123333211).

Subtracting from 1012121110 its reverse (111212101), we obtain a palindrome (900909009).

The spelling of 1012121110 in words is "one billion, twelve million, one hundred twenty-one thousand, one hundred ten".