1220332010021 has 4 divisors (see below), whose sum is σ = 1224674828844. Its totient is φ = 1215989191200.

The previous prime is 1220332010003. The next prime is 1220332010039. The reversal of 1220332010021 is 1200102330221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1220332010003) and next prime (1220332010039).

It can be written as a sum of positive squares in 2 ways, for example, as 379967452225 + 840364557796 = 616415^2 + 916714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220332010021 - 2¹⁴ = 1220331993637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220332010221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2171408990 + ... + 2171409551.

It is an arithmetic number, because the mean of its divisors is an integer number (306168707211).

Almost surely, 2^{1220332010021} is an apocalyptic number.

It is an amenable number.

1220332010021 is a deficient number, since it is larger than the sum of its proper divisors (4342818823).

1220332010021 is an equidigital number, since it uses as much as digits as its factorization.

1220332010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342818822.

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

Adding to 1220332010021 its reverse (1200102330221), we get a palindrome (2420434340242).

The spelling of 1220332010021 in words is "one trillion, two hundred twenty billion, three hundred thirty-two million, ten thousand, twenty-one".