1221545020030 has 16 divisors (see below), whose sum is σ = 2274601072320. Its totient is φ = 471769111072.

The previous prime is 1221545020019. The next prime is 1221545020051. The reversal of 1221545020030 is 300205451221.

It is a junction number, because it is equal to n+sod(n) for n = 1221545019977 and 1221545020004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2106111814 + ... + 2106112393.

It is an arithmetic number, because the mean of its divisors is an integer number (142162567020).

Almost surely, 2^{1221545020030} is an apocalyptic number.

1221545020030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221545020030 is a deficient number, since it is larger than the sum of its proper divisors (1053056052290).

1221545020030 is a wasteful number, since it uses less digits than its factorization.

1221545020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212224243.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 1221545020030 in words is "one trillion, two hundred twenty-one billion, five hundred forty-five million, twenty thousand, thirty".