1211311010 has 64 divisors (see below), whose sum is σ = 2697408000. Its totient is φ = 381376512.

The previous prime is 1211311001. The next prime is 1211311021. The reversal of 1211311010 is 101131121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211310982 and 1211311000.

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, 177746 + ... + 184434.

It is an arithmetic number, because the mean of its divisors is an integer number (42147000).

Almost surely, 2^1211311010 is an apocalyptic number.

1211311010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211311010 is an abundant number, since it is smaller than the sum of its proper divisors (1486096990).

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

1211311010 is a wasteful number, since it uses less digits than its factorization.

1211311010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6915.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1211311010 is about 34803.8936040208. The cubic root of 1211311010 is about 1065.9869505259.

Adding to 1211311010 its reverse (101131121), we get a palindrome (1312442131).

It can be divided in two parts, 121 and 1311010, that added together give a palindrome (1311131).

The spelling of 1211311010 in words is "one billion, two hundred eleven million, three hundred eleven thousand, ten".