1221330014121 has 48 divisors (see below), whose sum is σ = 2058331176960. Its totient is φ = 639842988960.

The previous prime is 1221330014111. The next prime is 1221330014123. The reversal of 1221330014121 is 1214100331221.

It is not a de Polignac number, because 1221330014121 - 2³¹ = 1219182530473 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 (1221330014123) 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, 6966361 + ... + 7139526.

It is an arithmetic number, because the mean of its divisors is an integer number (42881899520).

Almost surely, 2^{1221330014121} is an apocalyptic number.

It is an amenable number.

1221330014121 is a deficient number, since it is larger than the sum of its proper divisors (837001162839).

1221330014121 is a wasteful number, since it uses less digits than its factorization.

1221330014121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105954 (or 14105947 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1221330014121 its reverse (1214100331221), we get a palindrome (2435430345342).

The spelling of 1221330014121 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, fourteen thousand, one hundred twenty-one".