1221022119977 has 4 divisors (see below), whose sum is σ = 1332024130896. Its totient is φ = 1110020109060.

The previous prime is 1221022119959. The next prime is 1221022120027. The reversal of 1221022119977 is 7799112201221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1221022119977 - 2¹⁴ = 1221022103593 is a prime.

It is a super-3 number, since 3×1221022119977³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221022119077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55501005443 + ... + 55501005464.

It is an arithmetic number, because the mean of its divisors is an integer number (333006032724).

Almost surely, 2^{1221022119977} is an apocalyptic number.

It is an amenable number.

1221022119977 is a deficient number, since it is larger than the sum of its proper divisors (111002010919).

1221022119977 is a wasteful number, since it uses less digits than its factorization.

1221022119977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111002010918.

The product of its (nonzero) digits is 63504, while the sum is 44.

The spelling of 1221022119977 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred nineteen thousand, nine hundred seventy-seven".