1220925661011 has 48 divisors (see below), whose sum is σ = 2031829945600. Its totient is φ = 692026939584.

The previous prime is 1220925661003. The next prime is 1220925661051. The reversal of 1220925661011 is 1101665290221.

1220925661011 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 9 + 25 + 6 + 610 + 11 = 666.

It is not a de Polignac number, because 1220925661011 - 2³ = 1220925661003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220925661001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9719160 + ... + 9843978.

Almost surely, 2^{1220925661011} is an apocalyptic number.

1220925661011 is a deficient number, since it is larger than the sum of its proper divisors (810904284589).

1220925661011 is a wasteful number, since it uses less digits than its factorization.

1220925661011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126088 (or 126085 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 1220925661011 in words is "one trillion, two hundred twenty billion, nine hundred twenty-five million, six hundred sixty-one thousand, eleven".