1211020113 has 8 divisors (see below), whose sum is σ = 1616098528. Its totient is φ = 806644224.

The previous prime is 1211020103. The next prime is 1211020117. The reversal of 1211020113 is 3110201121.

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

It is not a de Polignac number, because 1211020113 - 2²¹ = 1208922961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211020117) 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, 171595 + ... + 178512.

It is an arithmetic number, because the mean of its divisors is an integer number (202012316).

Almost surely, 2^1211020113 is an apocalyptic number.

It is an amenable number.

1211020113 is a deficient number, since it is larger than the sum of its proper divisors (405078415).

1211020113 is a wasteful number, since it uses less digits than its factorization.

1211020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351263.

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

The square root of 1211020113 is about 34799.7142660683. The cubic root of 1211020113 is about 1065.9016112448.

Adding to 1211020113 its reverse (3110201121), we get a palindrome (4321221234).

It can be divided in two parts, 12110 and 20113, that added together give a palindrome (32223).

The spelling of 1211020113 in words is "one billion, two hundred eleven million, twenty thousand, one hundred thirteen".