1220021002101 has 8 divisors (see below), whose sum is σ = 1774576003104. Its totient is φ = 739406667920.

The previous prime is 1220021002073. The next prime is 1220021002121. The reversal of 1220021002101 is 1012001200221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220021002101 - 2⁵ = 1220021002069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021002121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18485166666 + ... + 18485166731.

It is an arithmetic number, because the mean of its divisors is an integer number (221822000388).

Almost surely, 2^{1220021002101} is an apocalyptic number.

1220021002101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220021002101 is a deficient number, since it is larger than the sum of its proper divisors (554555001003).

1220021002101 is a wasteful number, since it uses less digits than its factorization.

1220021002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36970333411.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1220021002101 its reverse (1012001200221), we get a palindrome (2232022202322).

The spelling of 1220021002101 in words is "one trillion, two hundred twenty billion, twenty-one million, two thousand, one hundred one".