1221021023030 has 64 divisors (see below), whose sum is σ = 2420872608960. Its totient is φ = 441702802944.

The previous prime is 1221021023021. The next prime is 1221021023051. The reversal of 1221021023030 is 303201201221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1265969 + ... + 2011148.

It is an arithmetic number, because the mean of its divisors is an integer number (37826134515).

Almost surely, 2^{1221021023030} is an apocalyptic number.

1221021023030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221021023030 is a deficient number, since it is larger than the sum of its proper divisors (1199851585930).

1221021023030 is a wasteful number, since it uses less digits than its factorization.

1221021023030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277233.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1221021023030 its reverse (303201201221), we get a palindrome (1524222224251).

The spelling of 1221021023030 in words is "one trillion, two hundred twenty-one billion, twenty-one million, twenty-three thousand, thirty".