1213031020011 has 16 divisors (see below), whose sum is σ = 1722081513600. Its totient is φ = 756865443968.

The previous prime is 1213031020007. The next prime is 1213031020021. The reversal of 1213031020011 is 1100201303121.

It is a happy number.

It is not a de Polignac number, because 1213031020011 - 2² = 1213031020007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213031020021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66429201 + ... + 66447458.

It is an arithmetic number, because the mean of its divisors is an integer number (107630094600).

Almost surely, 2^{1213031020011} is an apocalyptic number.

1213031020011 is a deficient number, since it is larger than the sum of its proper divisors (509050493589).

1213031020011 is a wasteful number, since it uses less digits than its factorization.

1213031020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132876858.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1213031020011 its reverse (1100201303121), we get a palindrome (2313232323132).

The spelling of 1213031020011 in words is "one trillion, two hundred thirteen billion, thirty-one million, twenty thousand, eleven".