1221267672130 has 128 divisors (see below), whose sum is σ = 2485659052800. Its totient is φ = 428257152000.

The previous prime is 1221267672089. The next prime is 1221267672133. The reversal of 1221267672130 is 312767621221.

It is not an unprimeable number, because it can be changed into a prime (1221267672133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71439864 + ... + 71456956.

It is an arithmetic number, because the mean of its divisors is an integer number (19419211350).

Almost surely, 2^{1221267672130} is an apocalyptic number.

1221267672130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221267672130 is an abundant number, since it is smaller than the sum of its proper divisors (1264391380670).

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

1221267672130 is a wasteful number, since it uses less digits than its factorization.

1221267672130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17380.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 1221267672130 in words is "one trillion, two hundred twenty-one billion, two hundred sixty-seven million, six hundred seventy-two thousand, one hundred thirty".