1220051156269 has 16 divisors (see below), whose sum is σ = 1401171209280. Its totient is φ = 1050645116160.

The previous prime is 1220051156257. The next prime is 1220051156287. The reversal of 1220051156269 is 9626511500221.

It is a cyclic number.

It is not a de Polignac number, because 1220051156269 - 2⁵ = 1220051156237 is a prime.

It is a super-2 number, since 2×1220051156269² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220051156209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1590187 + ... + 2229079.

It is an arithmetic number, because the mean of its divisors is an integer number (87573200580).

Almost surely, 2^{1220051156269} is an apocalyptic number.

1220051156269 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1220051156269 is a deficient number, since it is larger than the sum of its proper divisors (181120053011).

1220051156269 is a wasteful number, since it uses less digits than its factorization.

1220051156269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648060.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 1220051156269 in words is "one trillion, two hundred twenty billion, fifty-one million, one hundred fifty-six thousand, two hundred sixty-nine".