1220121201019 has 4 divisors (see below), whose sum is σ = 1394424229744. Its totient is φ = 1045818172296.

The previous prime is 1220121201017. The next prime is 1220121201059. The reversal of 1220121201019 is 9101021210221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220121201019 - 2¹ = 1220121201017 is a prime.

It is a super-2 number, since 2×1220121201019² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220121201017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87151514352 + ... + 87151514365.

It is an arithmetic number, because the mean of its divisors is an integer number (348606057436).

Almost surely, 2^{1220121201019} is an apocalyptic number.

1220121201019 is a deficient number, since it is larger than the sum of its proper divisors (174303028725).

1220121201019 is an equidigital number, since it uses as much as digits as its factorization.

1220121201019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174303028724.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1220121201019 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred one thousand, nineteen".