1221701571711 has 6 divisors (see below), whose sum is σ = 1764680048040. Its totient is φ = 814467714468.

The previous prime is 1221701571709. The next prime is 1221701571719. The reversal of 1221701571711 is 1171751071221.

1221701571711 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 70 + 1 + 571 + 7 + 11 = 666.

It is not a de Polignac number, because 1221701571711 - 2¹ = 1221701571709 is a prime.

It is a super-2 number, since 2×1221701571711² (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 (1221701571719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67872309531 + ... + 67872309548.

It is an arithmetic number, because the mean of its divisors is an integer number (294113341340).

Almost surely, 2^{1221701571711} is an apocalyptic number.

1221701571711 is a deficient number, since it is larger than the sum of its proper divisors (542978476329).

1221701571711 is a wasteful number, since it uses less digits than its factorization.

1221701571711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135744619085 (or 135744619082 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 36.

The spelling of 1221701571711 in words is "one trillion, two hundred twenty-one billion, seven hundred one million, five hundred seventy-one thousand, seven hundred eleven".