1227920688720 has 120 divisors (see below), whose sum is σ = 4498654915872. Its totient is φ = 297677740800.

The previous prime is 1227920688697. The next prime is 1227920688721. The reversal of 1227920688720 is 278860297221.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227920688721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77512326 + ... + 77528165.

Almost surely, 2^{1227920688720} is an apocalyptic number.

1227920688720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227920688720 is an abundant number, since it is smaller than the sum of its proper divisors (3270734227152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1227920688720 is a wasteful number, since it uses less digits than its factorization.

1227920688720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155040521 (or 155040512 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 1227920688720 in words is "one trillion, two hundred twenty-seven billion, nine hundred twenty million, six hundred eighty-eight thousand, seven hundred twenty".