1211313113021 has 8 divisors (see below), whose sum is σ = 1328733221088. Its totient is φ = 1095109794000.

The previous prime is 1211313112987. The next prime is 1211313113047. The reversal of 1211313113021 is 1203113131121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211313113021 - 2³⁰ = 1210239371197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211313112984 and 1211313113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211313113221) 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, 304195175 + ... + 304199156.

It is an arithmetic number, because the mean of its divisors is an integer number (166091652636).

Almost surely, 2^{1211313113021} is an apocalyptic number.

1211313113021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211313113021 is a deficient number, since it is larger than the sum of its proper divisors (117420108067).

1211313113021 is a wasteful number, since it uses less digits than its factorization.

1211313113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608394523.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1211313113021 its reverse (1203113131121), we get a palindrome (2414426244142).

The spelling of 1211313113021 in words is "one trillion, two hundred eleven billion, three hundred thirteen million, one hundred thirteen thousand, twenty-one".