1221202133013 has 48 divisors (see below), whose sum is σ = 1751556856896. Its totient is φ = 756565954560.

The previous prime is 1221202132993. The next prime is 1221202133083. The reversal of 1221202133013 is 3103312021221.

It is not a de Polignac number, because 1221202133013 - 2¹⁷ = 1221202001941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221202133083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155503795 + ... + 155511647.

It is an arithmetic number, because the mean of its divisors is an integer number (36490767852).

Almost surely, 2^{1221202133013} is an apocalyptic number.

It is an amenable number.

1221202133013 is a deficient number, since it is larger than the sum of its proper divisors (530354723883).

1221202133013 is a wasteful number, since it uses less digits than its factorization.

1221202133013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10134 (or 10117 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221202133013 its reverse (3103312021221), we get a palindrome (4324514154234).

The spelling of 1221202133013 in words is "one trillion, two hundred twenty-one billion, two hundred two million, one hundred thirty-three thousand, thirteen".