1220121111019 has 2 divisors, whose sum is σ = 1220121111020. Its totient is φ = 1220121111018.

The previous prime is 1220121110983. The next prime is 1220121111031. The reversal of 1220121111019 is 9101111210221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220121111019 - 2¹¹ = 1220121108971 is a prime.

It is a super-2 number, since 2×1220121111019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220121171019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060555509 + 610060555510.

It is an arithmetic number, because the mean of its divisors is an integer number (610060555510).

Almost surely, 2^{1220121111019} is an apocalyptic number.

1220121111019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220121111019 is an equidigital number, since it uses as much as digits as its factorization.

1220121111019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1220121111019 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand, nineteen".