1221131003099 has 32 divisors (see below), whose sum is σ = 1412024002560. Its totient is φ = 1034441920512.

The previous prime is 1221131003087. The next prime is 1221131003117. The reversal of 1221131003099 is 9903001311221.

It is a happy number.

It is not a de Polignac number, because 1221131003099 - 2²⁸ = 1220862567643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221131003899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143035559 + ... + 143044095.

It is an arithmetic number, because the mean of its divisors is an integer number (44125750080).

Almost surely, 2^{1221131003099} is an apocalyptic number.

1221131003099 is a deficient number, since it is larger than the sum of its proper divisors (190892999461).

1221131003099 is a wasteful number, since it uses less digits than its factorization.

1221131003099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9419.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 1221131003099 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one million, three thousand, ninety-nine".