1220121220199 has 8 divisors (see below), whose sum is σ = 1394432140800. Its totient is φ = 1045812271896.

The previous prime is 1220121220189. The next prime is 1220121220229. The reversal of 1220121220199 is 9910221210221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220121220199 - 2³⁶ = 1151401743463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220121220159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237502 + ... + 1992900.

It is an arithmetic number, because the mean of its divisors is an integer number (174304017600).

Almost surely, 2^{1220121220199} is an apocalyptic number.

1220121220199 is a deficient number, since it is larger than the sum of its proper divisors (174310920601).

1220121220199 is an equidigital number, since it uses as much as digits as its factorization.

1220121220199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986149.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 1220121220199 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, one hundred ninety-nine".