1213520002401 has 64 divisors (see below), whose sum is σ = 1966198427136. Its totient is φ = 649902489600.

The previous prime is 1213520002363. The next prime is 1213520002403. The reversal of 1213520002401 is 1042000253121.

It is not a de Polignac number, because 1213520002401 - 2¹⁰ = 1213520001377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1213520002403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 208756771 + ... + 208762583.

It is an arithmetic number, because the mean of its divisors is an integer number (30721850424).

Almost surely, 2^{1213520002401} is an apocalyptic number.

It is an amenable number.

1213520002401 is a deficient number, since it is larger than the sum of its proper divisors (752678424735).

1213520002401 is a wasteful number, since it uses less digits than its factorization.

1213520002401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1213520002401 its reverse (1042000253121), we get a palindrome (2255520255522).

The spelling of 1213520002401 in words is "one trillion, two hundred thirteen billion, five hundred twenty million, two thousand, four hundred one".