1021122201213 has 12 divisors (see below), whose sum is σ = 1474976186268. Its totient is φ = 680738028480.

The previous prime is 1021122201139. The next prime is 1021122201259. The reversal of 1021122201213 is 3121022211201.

It can be written as a sum of positive squares in 2 ways, for example, as 868105885284 + 153016315929 = 931722^2 + 391173^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1021122201213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122251213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174318 + ... + 1439663.

It is an arithmetic number, because the mean of its divisors is an integer number (122914682189).

Almost surely, 2^{1021122201213} is an apocalyptic number.

It is an amenable number.

1021122201213 is a deficient number, since it is larger than the sum of its proper divisors (453853985055).

1021122201213 is a wasteful number, since it uses less digits than its factorization.

1021122201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684284 (or 1684281 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1021122201213 its reverse (3121022211201), we get a palindrome (4142144412414).

The spelling of 1021122201213 in words is "one trillion, twenty-one billion, one hundred twenty-two million, two hundred one thousand, two hundred thirteen".