1223070979691 has 16 divisors (see below), whose sum is σ = 1394442736128. Its totient is φ = 1061880652800.

The previous prime is 1223070979681. The next prime is 1223070979721. The reversal of 1223070979691 is 1969790703221.

It is not a de Polignac number, because 1223070979691 - 2¹⁴ = 1223070963307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223070979601) 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, 3608711 + ... + 3933056.

It is an arithmetic number, because the mean of its divisors is an integer number (87152671008).

Almost surely, 2^{1223070979691} is an apocalyptic number.

1223070979691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223070979691 is a deficient number, since it is larger than the sum of its proper divisors (171371756437).

1223070979691 is a wasteful number, since it uses less digits than its factorization.

1223070979691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7542442.

The product of its (nonzero) digits is 2571912, while the sum is 56.

The spelling of 1223070979691 in words is "one trillion, two hundred twenty-three billion, seventy million, nine hundred seventy-nine thousand, six hundred ninety-one".